TY  - BOOK
AU  - Mangal, S.K.
AU  - Mangal, Uma
TI  - Essentials of educational technology
SN  - 978-81-203-3723-7
U1  - 372.358 
PY  - 2009///, r2011
CY  - New Delhi
PB  - PHI Learning
KW  - EDUCATIONAL TECHNOLOGY
ER  -