TY  - BOOK
AU  - Singh, Y. K.  
AU  - Sharma, T. K.
AU  - Upadhya, Brijesh
TI  - Educational technology : teaching-learning  
U1  - 371.3028  18th.
PY  - 2008///
CY  - New Delhi 
PB  - APH Publishing  
KW  - Educational technology-Study and teaching(Higher)
ER  -