Thayer, H R. Blue print reading and sketching / - 2nd. ed. - London : McGraw Hill Book Company, 1942. - viii, 135 p. : ill. ; 24 cm. - The Pennsylvania State college Industrial Series. . Includes index. Subjects--Topical Terms: Technical drawingEngineering graphicsMechanical drawing Dewey Class. No.: 620.004 / THA