TY  - BOOK
AU  -  Singh, Y K.
AU  -  Sharma, T K.; Upadhya, Brijesh.
TI  - Encyclopaedia of educational technology: Teaching-learning  
SN  - 9788131303559 (set)
PY  - 2008///
CY  - New Delhi
PB  -  A P H Pub. Corp.
KW  -  Educational technology.  ;   Teaching -- Aids and devices.
ER  -