De Kieffer, Robert E. Manual of audio-visual techniques R. E. de Kieffer, Lee W. Cochran. - 2d ed. - Englewood Cliffs, N.J. Prentice-Hall 1962. - 254 p. illus. - Prentice-Hall education series . LCCN: 61008223 /L/r87 Subjects--Topical Terms: Audiovisual education. LC Class. No.: LB1043 / .D45 1962 Dewey Class. No.: 371.33