TY  - BOOK
AU  - Mangal,S.K.
AU  - Mangal,Uma
TI  - Essentials of educational techonology
SN  - 9788120337237
U1  - 371.3 
PY  - 2013///
CY  - New Delhi
PB  - PHI Learning
KW  - Education
KW  - Techonology
N1  - Include index
ER  -