Mether, Calvin E. Audiovisual fundamentals : basic equipment operation, simple materials production / Calvin E. Mether, John R. Bullard, Bill Martin. - 4th ed. - Dubuque, Iowa : W.C. Brown, c1989. - xv, 230 p. : ill. ISBN: 0697061337 (pbk.) LCCN: 90023084 Subjects--Topical Terms: Audio-visual equipment.