TY  - BOOK
AU  - Kieffer, R.E.de
AU  - Cochran, L.W.
TI  - Manual of audio visual techniques/2e
U1  - 371.335 
PY  - 1966///
CY  - New Delhi
PB  - Prentice Hall of India
KW  - Charts
KW  - maps
ER  -