TY  - BOOK
AU  - Mangal, S. K.
AU  - Mangal. Uma
TI  - Essentials of Educational Technology 
SN  - 9788120337237
U1  - 371.33 
PY  - 2011///, 2014
CY  - New Delhi
PB  - PHI Learning 
KW  - Educational Technology
KW  - Education
N1  - index included
ER  -