TY  - GEN
AU  - Cochran, Lee W
AU  - DeKieffer,  R E
TI  - Manual of audio visual technique
T2  - Prentice Hall education series
U1  - 371.335 020 2 DEK 
CY  - U S A, Prentice -Hall Inc
KW  - Techniques audio visual / teaching material non projected / teaching material projected
ER  -