nam a22 7a 4500 21837 21837 170123b xxu||||| |||| 00| 0 eng d 0030890063 LB 1043 .D35 1969 Dale Edgar. Audiovisual method in teaching/ Edgar Dale. 3rd ed. Hindale: The dryden Press, 1969. xii,719p. : ill. ; 24cm. Include bibliographical references and index. Audio-visual education. Visual education. lcc BOOKS