TY  - BOOK
AU  - Rao, V. K
AU  - Reddy, R. S
TI  - The nature of educational technology
SN  - 9788171692286
U1  - 371.3078 RAO.6 
PY  - 1992///
CY  - New Delhi
PB  - Commonwealth Publishers
KW  - Audio-visual education
KW  - Educational technology
KW  - Teaching -- Aids and devices
ER  -