TY  - BOOK
AU  - Mangal,S.K.
AU  - Mangal,Uma
TI  - Essentials of educational technology
SN  - 9788120337237
PY  - 2009///
CY  - New Delhi
PB  - PHI Learning
KW  - Education, Elementary
KW  - India
KW  - Educational technology
N1  - Includes bibliographical references and index
ER  -