Organization for visual instruction /
Dudley, William H. 1868-1941.
Organization for visual instruction / by W.H. Dudley. - Washington : G.P.O., 1921. - 24 p. ; 23 cm. - Bulletin / Department of the Interior, Bureau of Education ; 1921, no. 7 . - Bulletin (United States. Bureau of Education) ; 1921, no. 7 .
e 22000036
Motion pictures in education--United States.
Slides (Photography)
L111 / .A6 1921, no. 7
Organization for visual instruction / by W.H. Dudley. - Washington : G.P.O., 1921. - 24 p. ; 23 cm. - Bulletin / Department of the Interior, Bureau of Education ; 1921, no. 7 . - Bulletin (United States. Bureau of Education) ; 1921, no. 7 .
e 22000036
Motion pictures in education--United States.
Slides (Photography)
L111 / .A6 1921, no. 7