TY  - BOOK
AU  - Mangal, S. K.
AU  - Uma Mangal auth.
TI  - Essentials of educational technology
SN  - 9788120337237
U1  - 371.33 
PY  - 2017///
CY  - Delhi
PB  - PHI learning
KW  - Education
KW  - Educational technology
N1  - Includes Biblio and Index
ER  -