Hepler, D. E., & Wallach, P. I. (1965). Architecture: : drafting and design. New York: McGraw-Hill Book Company.
Παραπομπή Chicago StyleHepler, Donald E., and Paul I. Wallach. Architecture: : Drafting and Design. New York: McGraw-Hill Book Company, 1965.
Παραπομπή MLAHepler, Donald E., and Paul I. Wallach. Architecture: : Drafting and Design. New York: McGraw-Hill Book Company, 1965.
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