na INLIS000000000002961 0010-0224000653 Multivision : the planning, preparation and projection of Audio-Visual Presentations by John Lewell Lewell, John New York Focal Press 1980 251 p. : ills. ; 22x29 cm. 621.3 LEW m AUDIO VISUAL PRESENTATIONS MULTIVISION PLANNING PREPARATION PROJECTION. 127/1993