TY  - BOOK
AU  - Wiman,Raymond V.
TI  - Instructional materials: an illustrated handbook of ideas, skills and techniques for producing and aud : ovisual materials 
SN  - 083960002X
PY  - 1972///
CY  - Worthington, Ohio
PB  - Charles A. Jones
KW  - Teaching
KW  - Aids and devices
KW  - Audio-visual equipment
N1  - Includes bibliographical references (p. 159-168) and index
ER  -