TY  - BOOK
AU  - Bhalla,C.L.
TI  - Audio-visual aids in education
U1  - 371.33 
PY  - 1963///
CY  - Delhi
PB  - Atma Ram
KW  - Audio-visual education
KW  - Educational technology
KW  - Instructional systems
KW  - Design
ER  -