Principles of engineering graphics problems, series 1 /
Henry Cecil Spencer ... [et al.].
APA Citation
Spencer, H. Cecil. (1990). Principles of engineering graphics problems, series 1. New York: Macmillan.
MLA Citation
Spencer, Henry Cecil, 1903-1972. Principles of Engineering Graphics Problems, Series 1. New York: Macmillan, 1990.
Warning: These citations may not always be complete (especially for serials).