De Kieffer, Robert Eulette, 1916- Manual of audio-visual techniques / R. E. de Kieffer, Lee W. Cochran. - Second edition - viii, 254 páginas ; 28 cm. - Prentice-Hall education series . LCCN: 55-010535 Subjects--Topical Terms: Educación audiovisual. LC Class. No.: LB1043 / .D45 1962