Shalkhauser, G. W. Basic lessons in technical drafting; a step by step program / G. W. Shalkhauser and R. M. Coleman. - 1st ed. - Boulder, Colo., Pruett Press c1968. - 1 v. (various pagings) illus. 29 cm. English. LCCN: 68021379 Subjects--Topical Terms: Mechanical drawing. LC Class. No.: T353 / .S452 Dewey Class. No.: 604.24/SHB