1. Highway Research Board Special Report;C. Leven,1968
2. C. Wright Mills,The Sociological Imagination (New York: The Oxford University Press, 1959), p. 5.
3. E. T. Hall,The Hidden Dimension (Garden City, New York: Doubleday & Company, Inc., 1966); A. I. Hallowell,Culture and Experience (Philadelphia: University of Pennsylvania Press, 1955); K. Lorenz,On Aggression (New York: Harcourt, Brace and Company, 1966); N. Tinbergen,Social Behavior in Animals (London: Methuen & Co., Ltd., 1953); R. Sommer,Personal Space: the Behavioral Basis of Design (Englewood Cliffs, New Jersey: Prentice-Hall, Inc., 1969); J. Piaget and B. Inhelder,The Child's Conception of Space (London: Routledge and Kegan Paul Ltd., 1956); E. Cassirer,An Essay on Man (New Haven: Yale University Press, 1944) andThe Philosophy of Symbolic Form (New Haven: Yale University Press, I, II, 1955, 1957); and S. K. Langer,Feeling and Form: a Theory of Art (New York: Charles Scribner's Sons, 1953).
4. K. Lynch,The Image of the City (Cambridge: The M.I.T. Press, 1960); C. A. Doxiadis,Ekistics (New York: The Oxford University Press, 1968).
5. See D. Harvey,Explanation in Geography (London: Edward Arnold, 1969) and A. Buttimer (Sister Mary Annette, O.P.), “Interdisciplinary Perspective on Social Space,”Geographical Review, LIX, 1969.