TY  - BOOK
AU  - Chakravarty, S. R.
TI  - Audio visual aids in education
U1  - 371.33 
PY  - 1977///
CY  - New Delhi
PB  - Sagar publications
KW  -  Audio-visual education
KW  - Teaching -- Aids and devices
N1  - Includes bibliographical reference
ER  -