TY  - BOOK
AU  - Mangal,S.K
AU  - Mangal,Uma 
TI  - Essentials of Educational Technology
SN  -  9788120337237
U1  - 371.3 
PY  - 2010///
CY  - Delhi
PB  - PHI Learning Private Limited
KW  - শিক্ষাবিজ্ঞান
KW  - Education
ER  -