TY  - BOOK
AU  - Mangal, S.K.
AU  - Mangal,Uma
TI  - Essentials of educational technology
SN  - 9788120337237
U1  - 371.33 
PY  - 2022///
CY  - Delhi 
PB  - PHI Learning         
KW  - Educational technology
N1  - Includes author index and subject index
ER  -