Vocational education bulletin
United States Department of the Interior, Office of Education : United States Government Printing Office
U.S.G.P.O. 1937 revised ed. Vocational education bulletin no. 1 . General Series ; no. 1
所蔵館1館
U.S.G.P.O. 1935 Vocational education bulletin no. 180 . Agricultural Series ; no. 47
所蔵館2館
by W.A. Ross and L.L. Scranton
U.S. Dept. of the Interior , Office of Education [19--] Vocational education bulletin no. 189 . Agricultural series ; no. 51
by Robert W. Hambrook
United States Department of the Interior, Office of Education : United States Government Printing Office 1936 Vocational education bulletin no. 185 , Trade and industrial series no. 53
