TY  - BOOK
AU  - Bullard,John R.
AU  - Mether,Calvin E.
ED  - W. C. Brown Publishers
TI  - Audiovisual fundamentals: basic equipment operation, simple materials production 
SN  - 0697060438
U1  - 621.3897 23
PY  - 1974///.
CY  - Dubuque, Iowa: 
PB  - W. C. Brown, 
KW  - Audio-visual equipment
ER  -