Proffitt, Maris M. 1876- The general shop / by Maris M. Proffitt. - Washington : U.S. G.P.O., 1929. - iii, 27 p. : plans ; 23 cm. - Education bulletin / United States Department of the Interior ; 1929, no. 30 . LCCN: e 29000353 Subjects--Topical Terms: Manual training.Technical education. LC Class. No.: L111 / .A6 1929, no. 30 TT168 / .P8