TY  - BOOK
AU  - Yadav, D.S. 
AU  - Shastri, K.N. 
TI  - Educational technology
SN  - 9788190484565
U1  - 371.3078 
PY  - 2007///
CY  - New Delhi 
PB  - Neha Publishers & Distributors
KW  - Educational technology
ER  -