Booker, P.. (1962). A History of Engineering Drawing. London: Chatto & Windus. (page 22).
The Mind's Eye: Nonverbal Thought in Technology
Ferguson, E. S.. Science 197, no. 4306. : . (22). (August 26, 1977), pp. 827-36.
"The Development of Graphical Representations."
Higbee, F. G.. (1949). Proceedings of the Summer School for Drawing Teachers. New York: McGraw-Hill. (page 22). Eds. R. P. Hoelscher, J. Rising. pp. 9-26.
"Historical Developments of Graphics."
Land, M. H.. Engineering Design Graphics Journal 40, no. 2. : . (page 22). (Spring 1976), pp. 28-33.
"Gaspard Monge and the Origins of Descriptive Geometry."
Reynolds, T. S.. Engineering Design Graphics Journal 40, no. 2. : . (spring 1976), pp. 14-19.
