TY  - BOOK
AU  - Mangal, S.K
TI  - Essentials of educational technology
SN  - 9788120337237
U1  - 371.4 
PY  - 2009///
CY  - New Delhi
PB  - Phi Learning Private Limited
KW  - Education
KW  - Systems of education
KW  - Educational technology
ER  -