Home/Search Documents Themes Visuals Context FAQ/Contact Documents   2010+ 2000-2009 (550+) 1990-1999 (580+) 1980-1989 (400+) 1970-1979 (210+) 1962-1969 (40+) All years PDF docs (160+) PDF collections (150+) PPT presentations (10) Encyclopedia project commentaries (300+) Encyclopedia project commentaries (300+)   Commentaries on World Problems Project (30+) Commentaries on Global Strategies Project (80+) Commentaries on Human Development Project (20+) Commentaries on Integrative Knowledge Project (10+) Commentaries on Human Values Project (20+) Commentaries on Transformative Approaches Project (90+) Commentaries on Metaphors/Patterns Project (30+) Themes   Organizations and networks Conferencing and dialogue Human development Knowledge organization Comprehension & communicability Conceptual patterns Knowledge presentation Learning, experiments, patterns Strategy and governance Challenges, problems, issues Management & information systems Musings Future possibilities & Change? Resources Organizations and networks   International organizations and associations Civil society Interrelationship Networking, tensegrity, virtual organization Beyond the matrix Community,lifestyle, occupation Case study: Union of International Associations Conferencing and dialogue   Dialogue and transformative conferencing Human development   Human development and self-reflection Faith, religion and spirituality Human values and wisdom Existential engagement and embodiment Community, lifestyle, occupation Time: futures, present moment, history Knowledge organization   Beyond the matrix Diversity, variety, typology Knowledge organization and classification Systems, complexity, loops, maths Synthesis, transdisciplinarity and integration Comprehension & communicability   Comprehension and communicability Terrorism: the conceptual challenge Criticism, bias and dissent Conceptual patterns   Configurations and patterns Paradigm change, social transformation Alternation, dynamics, movement Polarization, dilemmas, duality Knowledge presentation   Visualization, presentation, mapping Metaphor for governance Identity through metaphor Culture and aesthetics Language "Poems" on this Site Learning, experiments, patterns   Learning, education Experiments, case studies, forms of presentation Experimental declarations Patterns of I Ching / Tao te Ching Strategy and governance   Global strategy and policy making Governance, democracy, participation, access Legal status, agreements, rights Declarations, principles, guidelines Challenges, problems, issues   World problems / Strategic issues Specific policy issues Conflict / Disputes/ Territory Terrorism: the conceptual challenge Environment / Ecology / Biodiversity Climate / Global warming Overpopulation / Resource overshoot Health / Disease Sustainable development Community, lifestyle, occupation Management & information systems   Management of international organizations International information and documentation Software innovation and groupware International facilitation and empowerment Musings   Musings, irresponsible and otherwise "Poems" on this Site Quests, questions and answers Future possibilities & Change?   Change: Questions for the future? Way Round Cognitive Ground Zero and Pointlessness? Resources   Resources, links Data, statistics Visuals   All images on Laetus site via Google (+2,700) Selected images on Laetus site via Google Experimental visualization of networks PPT presentations (with images) Selected images on Laetus site via Google   Images on Laetus site by theme Images on Laetus site by decade Images on Laetus site by year Experimental visualization of networks   On Laetus site Selected presentations of interrelationships between UIA databases Gallery of screen shots of virtual reality displays (WRL) Experimental representations of entity interrelationships (SVG) Network visualizations (PDF) On Laetus site   Selected Screen-shots of Problem and Organization Networks (WRL/PDF) NetMap visualizations of questions, problems, strategies, and values Problems and strategies: Energy / Water / Strategies against violence Questions: Peace-related / Faith-Prosperity-related Pattern-language Network visualizations (PDF)   2001: Spring maps (organizations, problems, strategies, values) -- gallery 2002: Network analyses (organizations, problems, strategies, values) -- gallery 2003: Network analyses (organizations, problems, strategies, values) -- gallery 2004: Network analyses (organizations, problems, strategies, values) -- gallery Context   Association context (map) Complementary initiatives Research resources Historical associations Complementary initiatives   Cognitive Fusion Reactor (ITER-8) Union of Imaginable Associations University of Earth Union of the Whys Research resources   Laetus in Praesens Historical associations   Union of Intelligible Associations Union of International Associations Mankind 2000 / Humanité 2000 FAQ/Contact   Contact FAQ: Website FAQ: Author ? FAQ: Themes FAQ: Style / Content / Method FAQ: Credibility FAQ: Publication policy / Audience FAQ: Links / References / Citations FAQ: Alternative electronic publishing methods FAQ: Site maintenance and errors FAQ: Acknowledgements FAQ: Website   Meaning of Laetus in Praesens? Responsibility for Laetus in Praesens? Ideological agenda? Purpose, motivation or bias? Intent in quotes? FAQ: Author ?   Anthony Judge (unless otherwise stated) Bio of Anthony Judge FAQ: Themes   Range of topics treated? Focus/intention of the articles? Obtaining an overview of topics treated? Searching for articles? Obsolescence? Particular biases? FAQ: Style / Content / Method   Advice for the impatient reader? Length / complexity / readability? Mix of "serious" and "irresponsible"? Definitive? Methodology? Critical style? FAQ: Credibility   Authoritative? Knowledge base? Disciplines? Peer review? Basis for writing? Quantity produced? Status? FAQ: Publication policy / Audience   Copyright status? Publication elsewhere? Intended audience? Dissemination? Book form? FAQ: Links / References / Citations   Links to other documents? Self-citation? Bibliographical standard? FAQ: Alternative electronic publishing methods   Content Management System (CMS)? Segment the articles? Blog facility? FAQ: Site maintenance and errors   Under construction? Articles in draft form? Broken links? Spelling? Errors of fact? Updating indexes?

1978 Representation, Comprehension and Communication of Sets the Role of Number (References) - / - References of Representation, Comprehension and Communication of Sets: the Role of Number (1978) Abstract | Parts 1-3 | Notes | Annex 1 | Annex 2 | Annex 3 | Annex 4 References 1. R. Buckminster Fuller. Synergetics: explorations in the geometry of thinking. New York: Macimillan, 1975. 2. C. Alexander. Notes on the Synthesis of Form. Harvard University Press 1964. 3. K. Duncker. A qualitative (experimental and theoretical) study of productive thinking (solving of comprehensible problems). In: J. of Genetic Psychology 33 (1926) p. 642708 (see also: Psychological Monographs, Washington 1945. 270). 4. G. A. Miner. The magical number seven, plus or minus two: some limits on our capacity for processing information. In: Psychological Rev. 63 (1956) p. 81-97. 5. H. A. Simon. The sciences of the artificial. Cambridge: MIT Press 1969. 6. Method for priority determination in science and technology. Paris: Unesco 1978. p. 24 (Science Policy Series, 40). 7. Y. Friedman. The critical group size. In: International Associations 26 (1974) No. 5, p. 284 285. 8. A. Jay. Corporation man. London: Jonathan Cape 1972. 9. M.-L. v. Franz. Number and time; reflections leading towards a unification of psychology and physics. London: Rider 1974. 10. L. L. Whyte, et al. (Ed.): Hierarchical structures. New York: American Elsevier 1969. 11. M. Maruyama. Paradigmatology and its application to cross-disciplinary, cross-professional and cross-cultural communication. In: Cybernetica 17 (1974) p. 136-156 and p. 237-281. 12. M. Maruyama. Heterogenistics: an epistemological restructuring of biological and social sciences. In: Cybernetiea 20 (1977) p. 69-86. 13. Anthony Judge. Inernational organization networks; a complementary perspective. In: Paul Taylor and A. J. R. Groom (Eds.): International Organisation: a conceptual approach. New York: Nichols Publ. 1978. p. 381-413. [text] 14. Lippitt, G. L.: Visualizing change; model building and the change process. Fairfax: NTL Learning Resources Corp. 1973. 15. Michal, G.: Biochemical pathways. Mannheim: Boehringer Mannheim GmbH 1974. 16. Anthony Judge. Mapping possibilities in response to information needs of science policy-making for development. (Paper prepared for the Secretary of the Commonwealth Science Council; presented to the 6th Congres of the World Future Studies Federation, Cairo. September 1978). [text] 17. W. T. Jones. The romantic syndrome: toward a new method in cultural anthropology and the history of ideas. The Hague: Martinus Nijhof 1961. 18. G. S. Brown. Laws of form. London: G. Allen & Unwin 1969. 19. Yearbook of World Problems and Human Potential. Brussels: Union of International Associations and Mankind 2000, 1976. (see Encyclopedia of World Problems and Human Potential, 1994-5) 20. General Systems Yearbook (1956-). Society for General Systems Research. 21. R. Arnheim. Visual thinking. London: Faber 1970. 22. K. Critchlow. Order in space: a design source book. London: Thames and Hudson 1969. 23. R. E. Williams. Handbook of structure. Huntington Beach: Douglas Advanced Research Labs. 1968. (Paper 5321) Williams, R. E.: Natural structures: toward a form language. Moorpark: Eudaemon Press 1972. 24. J. Galtung. Structural analysis and chemical models. In: Methodology and ideology. Copenhagen: Christian Eilers 1977. p. 160 189. 25. A. M. Young. The geometry of meaning. San Francisco: Delacorte Press 1976. 26. A. M. Young. The reflexive universe: evolution of consciousness. San Francisco: Delacorte Press 1976. 27. J. B. Carroll (Ed.): Language, thought and society, selected writings of Benjamin Lee Whorf. New York: Wiley 1956. 28. C. S. Smith. Structural hierarchy in inorganic systems. In: L. L. Whyte et al. (Ed.): Hierarchical structures. New York: American Elsevier 1969. 29. D. G. Langham. and J. W. Petras. The sociology of knowledge. London: Duckworth 1970. 36. K. Critchlow. Islamic patterns: an analytical and cosmological approach. London: Thames and Hudson. 37. L. L. Whyte (Ed.): Aspects of form. London: Lund Humphries 1968. 38. G. Tucci. Theory and Practice of the Mandala. London: Rider 1960. 39. O. Whicher. Projective Geometry. London: Rudolf Steiner Press 1971. 40. La Science et la diversite des cultures. Paris, Unesco, 1974; Cultures and Time. Paris, Unesco. 1974; Time and the Sciences. Paris: Unesco 1979? 41. Jay Hilary Kelley. Entropy of knowledge. In: Philosophy of Science 36 (1969) No.2 (June) 42. Francisco Varela. A calculus for self-reference. In: Intern. J. of General Systems 2 (1975) p. 5-24 43. K. Gödel. Uber formal unentscheidbare Satze der Principia Mathematica und verwandter Systeme. 1. In: Monatshefte fur Mathematik u. Physik 38 (1931) p. 173 -198 44. Marcel Granet. La pensée chinoise. Paris: Ed. Albin Michel 1968 45. J. G. Bennett. The dramatic universe. London: Hodder and Stoughton 1956-1966. 4 vols. 46. Bertrand Russell. Essay on logical atomism. In: Cont. Brit. Phil. Series 1. London 1928 47. Bertrand Russell. Higher Relationships. In: Cont. Brit. Phil., Series 1. Also in: Human Knowledge, p. 271-3 48. Xavier Sallantin. L'epistemologie de l'arithmetique. (Communication aux Seminaires internationaux d'epistemologie de l'Abbaye de Senanque, Sept. 1976). Paris: Laboratoire Bena de Logique Generale 1976. (A longer version of this paper appeared as Pt. 3 of L'Epreuve de la Force. Cahiers de la Fondation pour les Etudes de Defense Nationale. No. 2, Octobre 1975) 49. Kinhide Mushakoji. Scientific revolution and inter-paradigmatic dialogues. Tokyo: United Nations University 1978. (Working Paper of the Goals, Processes and Indicators of Development Project of the Human and Social Development Programme. 50. Jean Petito-Cocord. Identite et catastrophes; topologie de la difference. In: Benoist, J. M. et al: L'ldentite; seminaire interdisciplinaire dirige par Claude Levi-Strauss. Paris, 1977. p. 109-156 51. Tokuryu Yamauchi. Logos to Lemma. Tokyo, 1974 52. J. Lukasiewicz. Selected Logical Papers. Amsterdam: North HoHand 1970. 53. Gotthard Gunther. Logik, Zeit, Emanation und Evolution. Koln und Opladen: Westdeutscher Verlag 1967. Heft 136 54. A. Korzybski. Science and Sanity; an introduction to nonAristotelian systems and general semantics. Lakeville, Conn.: International Non-Aristotelian Library 1948 55. Gerald Holton. The roots of complementarily. In: Dacdalus (Amer. Assoc. for the Advancewent of Science). Fall 1970. p. 1015 1055 56. Johan Galtung. Methodology and Ideology; essays. Copenhagen: Christian Ejlers 1977. p. 41 - 71 57. Anthony Wilden. System and Structure; essays in communication and exchange. London: Tavistock 1972 58. I. Dahlberg. A referent-oriented, analytical concept theory for INTERCONCEPT. In: Intern. Classificat. 5 (1978) No. 3, p. 142 151 59. G. Sartori, F. W. Riggs, F. W. and H. Teune. Tower of Babel: on the definition and analysis of concepts in the social sciences. Pittsburgh, P.: University of Pittsburgh 1975. (Intern. Studies Assoc. Occ. Paper No. 6) Arising from work of the Committee on Conceptual and Terminological Analysis (COCTA), now collaborating with Unesco through the latter's Interconcept programme 60. Union des Associations Internationales: Le Probleme du Langage dans la Societe Transnationale. Bruxelles 1975. (Compte rendu d'un colloque en association avec COCTA) 61. I. Sutherland. Computer graphics. In: Datamation (1966) May, p. 22 27 62. Krishnappa Subramanyam. Seminal mnemonics in classification. In: Intern. Classificat. 3 (1976) Nr. 1, p. 16-18 63. A. Neelameghan. Seminal mnemonics as a pattern for systems analysis. In: Library Science with a Slant to Documentation 7 (1970) p. 353-364; Neelameghan, A.: Presentation of ideas in technical writing. Delhi-Bombay-Bangalore-Kanpur: Vikas Publ. House 1974. 189 p. 64. Matila C. Ghyka. Le nombre d'or. Paris: Gallimard 1931.; Ghyka, Matila C.: Philosophie et mystique du nombre. Paris: Payot 1952 65. Christopher Butler. Number symbolism. London: Routledge and Kegan Paul 1970 66. Vincent F. Hopper. Medieval number symbolism. New York: Cooper Square Publ. 1969 (reprint of 1938 ea.) 67. S. R. Ranganathan. Prolegomena to Library Classification. Bombay etc.: Asia Publ. House 1967. (3rd ea.) Sect.2 68. Frances A. Yates. The art of memory. London: Routledge and Kegan Paul 1966. (page refs to Penguin ed.) 69. D.C. Engelbart. Augmenting Human Intellect; a conceptual framework. Menlo Park: Stanford Research Institute 1962. (AFOSR-3223) 70. Gilbert Durand. Les structures anthropologiques de l'imaginaire. Paris 1963 71. R. Berteaux. La vole symbolique. Paris: Lanzeray International 1978 72. Mircea Eliade. Images et symboles. Paris: Gallimard 1952 73. Mircea Eliade. Le Chamanisme et les techniques archaiques de l'extase. Paris 1951 74. Charles T. Tart (Ed.): Altered states of consciousness. New York: Wiley 1969. States of Consciousness. Dutton 1975 75. U.S. Army Medical Intelligence and Information Agency. Office of the Surgeon General. Soviet and Szechoslovakian Parapsychology Research. Part 11: Psychotronic generator research). Washingtin D.C.: Defense Intelligence Agency. Sept. 1975. (DST-1810S-387-75) 76. Anthony Judge. Mobilization of public opinion; yesterday's response to today's problems. In: Transnational Associations 31 (1979) No. 1/2, p. 8-14. [text] 77. C. G. Jung. Mysterium Coniunctionis. XIV, ff 767-70 78. M. D. Waller. Chladni Figures: a study in symmetry. London 1961 79. A. Maslow. Religions, values and peak experiences. Columbus, Ohio: Ohio State University Press 1964 80. Zeman, J.: Information and psychic activity. In: Progress in Brain Research 17. Amsterdam: Ed. Wiener-Schode 1965. 81. G. Jumarie. Further advances in relativistic information and general systems; interferences of observers. In: Cybernetica 21 (1978) No. 2, p. 93-123; Jumarie, G.: A relativistic information approach to the structural dynamics of general systems; morphogenesis. In: Cybernetica 19 (1976) No. 4, p. 273-304. 82. Hermann Weyl. Symmetry. Princeton University Press 1952. (See also note 33) 83. R. Rolling. The role of graphic display of concept relationships in indexing and retrieval vocabularies. In: P. Atherton (Ed.): Classification Research. Copenhagen: 1965. p. 295 - 325 84. Peter S. Stevens. Patterns in nature. London: Penguin 1974 85. L. L. Whyte (Ed.). Aspects of form. London: Lund Humphries 1968 86. J. Piaget. Biology and knowledge; an essay on the relations between organic regulations and cognitive processes. Edinburgh University Press 1971. 87. Colin Cherry. On human communication. Cambridge: MIT Press 1966. 88. R. Arnheim. Gestalt psychology and artistic form. In: Whyte, L. L. (Ed.): Aspects of Form. London: Lund Humphries 1968, p. 202 89. R. Laban. Choreutics. London: Macdonald and Evans 1966. (Ed. by Lisa Ullmann) 90. E. Bindel. Die Zahlengrundlagen der Musik. Stuttgart 1950. 91. E. Bindel. Die geistigen Grundlagen der Zahlen. Stuttgart 1958. 92. J. Attali. Bruits: essai sur l'économie politique de la musique. Paris: Presses Universitarres de France 1977. (Demonstrates how the form of musical innovations heralds equivalent socio-political changes and how music may be used to reinforce the status quo.) 93. A. Ehrenzweig. The hidden order of art; a study in the psychology of artistic imagination. Los Angeles: University of California 1967. 94. G. Kepes. (Ed.): Structure in art and in science. New York: Braziller (Vision andValueSeries, several volumes) 95. M. C. Ghyka. L'esthetique des proportions dans la nature et dans les arts. Paris: Editions de la NRF 1927. (see also ref.64) 96. A. Pugh. An introduction to tensegrity. Los Angeles: University of California Press 1976. 97. Anthony Judge. Transcending duality through tensional integrity; from systems-versus-networks to tensegrity organization. In: Transnational Associations 30(1978) No. 5, p. 258 -265 [text] 98. Anthony Judge. Groupware configurations of challenge and harmony; an alternative approach to "alternative organisation". (Paper for a seminar on alternative organizations of the European Institute for Advanced Studies in Management. Brussels, June 1979) [text] 99. Anthony Judge. Viable need patterns and their identification through constraints on representation in 3-dimensions. In: Lederer, K. (Ed.): Human needs; a contribution to the debate. Berlin: International Institute for Environment and Society (Wissenschaftszentrum) 1979. [text] 100. Anthony Judge. Tensed networks. In: Transnational Associations 30 (1978) No. 11, p.480-485 [text] 101. Anthony Judge. Development; beyond "science" to "wisdom"; facilitating the emergence of nonfigurative understanding in "Councils of the Wise" through computer conferencing dialogues. In: Transnational Associations 31 (1979) No. 7/8, p. 364-372 [text] 102. Anthony Judge. Organization and lifestyle design; characteristics of a nonverbal structural language. (Paper prepared for the Intern. Konf. Bedingungen des Lebens in der Zukunft und ihre Folgen für die Erziehung. Berlin, November 1978) [text] 103. E. Herrigel. Zen in the art of archery. Pantheon 1953. 104. S. Boorman. The protracted game: a wei ch'i approach to Mao's revolutionary strategy. Oxford University Press, 1971. 105. W. R. Ashby. Requisite variety and its implications for the control of complex systems. In: Cybernetica 1(1958) No. 2, p. 83 106. F. J. Varela. On being autonomous; the lessons of natural history for systems theory. In: G. J. Klir (Ed.): Applied General Systems Research. New York: Plenum Publ. 1978; p.77 83, see also (42) 107. N. S. Don. The transformation of conscious experience and its EEG correlates. In: J. of Altered States of Consciousness 3(1977 78) No. 2, p. 147 168 108. W. T. Powers. Behavior; the control of perception. Chicago: Aldine 1973. 109. G. K. Zipf. Human behavior and the principle of least effort. An introduction to human ecology. Reading, Mass.: Addison-Wesley 1949. 110. B. Mandelbrot. An informational theory of the statistical structure of language. In: W. Jackson (Ed.): Communication Theory. New York: Academic 1953, p. 486 502 111. Anatol Rapoport. Comment: the stochastic and the "teleological" rationales of certain distributions and the so-called Principle of Least Effort. In: Behavioral Science 2(1957) p. 147-161 112. G. Bateson. Mind and nature; a necessary unity. New York: Dutton 1979. 113. R. Margalef. On certain unifying principles in ecology. In: A. S. Boughey (Ed.): Contemporary Readings in Ecology. Belmont: Dickenson 1969. 114. F. Rziha. Studien uber Steinmetz-Zeichen. Wien 1883. 115. R. Abellio. La structure absolue. Paris: Gallimard 1965. 116. E. Haskell. Generalization of the structure of Mendeleev's periodic table. In: Full Circle. New York: Gordon and Breach 1972. p. 21 -87 117. S. C. Dodd. The epicosm model for the material and mental universes. In: Progress in Cybernetics. New York: Gordon and Breach 1979. 118. G. T. Lockland. Grow or die: the unifying principle of transformation. New York: Random House 1973. 119. J. Needham. The system of the Book of Changes. In: Science and Civilization in China; the fundamental ideas of Chinese science. Cambridge University Press 1956. Vol. 120. F. v. d. Blij. Combinatorial aspects of the hexagrams in the Chinese Book of Changes. In: Scripta Mathematica 28(1967) No. 1, p. 37 49 121. M. Gardner. The combinatorial basis of the I Ching. In: Scientific American (1974) Jan., p. 108 -113 122.Z. D. Sung. The symbols of the Yi King; the symbols of Chinese logic of changes. New York: Paragon Reprint 1969. 123. M. Schonberger. Verborgener Schlusselzum Leben.Weltformel I-Ging im genetischen Code. Frankfurt: Fischer Taschenbuch 1977. 124. F. Harary. Graph diagrams. In: Graph Theory. Reading: Addison-Wesley 1971,p. 213 -234 125. A. Pugh. Polyhedra: a visual approach. Los Angeles: University of Calffornia Press 1976. 126. E. Kingsley, F. F. Kopstein and R. J. Seidel. Graph theory as a meta-language of communicable knowledge. In: M. D. Rubin (Ed.): Man in systems. New York: Gordon and Breach 1971, p. 43 69 127. F. F. Kopstein and B. D. Haureider. The macro-structure of subject matter as a factor in instruction. Princeton: Educational Testing Service 1966. (Research Memo RM-66-25) 128. D. Brown and J. Lewis. The Process of conceptualization; some fundamental principles of learning useful in teaching with or without the participation of computers. Menlo Park: Stantord Research Institute. Educational Policy Rcsearch Center 1966? 129. Anthony Judge. Relationship between elements of knowledge. Brussels: Union of International Associations 1971. (Committee on Conceptual and Terminological Analysis. Working Paper No. 3) [text] 130. C. P. Hornung. Handbook of designs and devices. New York: Dover Publications. (Contains 1800 geometric designs based on circle, triangle, square, scroll, cross, etc.. 131. P. Pearce. Structure in nature as a strategy for design Cambridge: MlT Press 1978. 132. Anthony Judge. Information mapping for development. In:Transnational Associations 31 (1979)No.5, p.185 -192. [text] 133. R. J. Heuer, Jr., (U.S. Central Intelligence Agency): Cognitive aspects of intelligence analysis. (Paper for the 20th Convention of the International Studies Association, March 1979) 134. A. de Nicolas. Meditations through the Rg Veda; four-dimensional man. Boulder: Shambhala 1978 135. E. G. McClain. The myth of invariance; the origins of the gods, mathematics and music from the Rg Veda to Plato. Boulder: Shambhala 1978 136. Roland Fischer. A cartography of the ecstatic and meditative states. In: Science 174(1971) p. 897 -904 137. E. Jantsch. Design tor evolution; self-organization and planning in the life of human systems. New York: Braziller 1975 138. E. Jantsch and C. Waddington (Eds.). Evolution and consciousness; human systems in transition. Reading; Mass.: Addison-Wesley 1976 139. P. A. Heelan. The logic of changing classificatory frameworks, In: Wojciechowski, J. A. (Ed.): Conceptual basis of the classification of knowledge. Munchen: K. G. Saur 1974. p. 260-274 140. P. A. Heelan. Complementarity, context-dependence and quantum logic. In: Foundations of Physics 1(1970) p. 95 -100 141. P. A. Heelan. Classical logic and quantum logic; their respective roles. In: Synthèse 21(1970) p. 2 -33 142. Anthony Judge and David Horton Smith. Interrelating viewpoints in complex meetings. In: Transnational Associations 30 (1978) No. 12, p. 542 548 [text]

This work is licenced under a Creative Commons Licence.