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Colquhoun, Alan. "Typology and Design Method. Meaning In Architecture. Edited by Charles Jencks and George Baird. London: 1969.

The Harvard Architectural Review.  Volume I, Spring 1980.  MIT Press, 1980.

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Kahn, Louis. From a talk given at the Politecnico de Milano in January, 1967.

Koestler, Arthur. The Act of Creation. London: Hutcheson & Co, 1964.

Laugier, Marc-Antoine.  An Essay on Architecture.  Translated and with an Introduction by Wolfgang and Anni Herrmann.  Hennessey & Ingalls, Inc., 1977.

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Wittkower, Rudolph. Architectural Principles in the Age of Humanism. New York: Norton Library, 1971.