Gillis, Don, 1912-1978. The art of media instruction. [electronic resource] . — Dallas, : Crescendo Book Publications, [1973]. — xi, 323 p. : illus. 24 cm. Bibliography: p. 306-323. LCCN: 73085869 Subjects--Topical Terms: Audio-visual education.Teaching--Aids and devices.Enseignement--Méthodes audiovisuelles.Matériel didactique.Einführung.Mediendidaktik. LC Class. No.: LB1043 / .G54 Dewey Class. No.: 371.33