nam a22 7a 4500 30454 30454 190701b xxu||||| |||| 00| 0 eng d 9788120337237 LB 1028.3 .M36 2009 Mangal, S.K. Essentials of educational technology / S.K. Mangal & Uma Mangal. New Delhi : PHL learning, 2009. xxiv,812p. : ill. ; 24cm. include index and bibliographic references. Educational technology. Education. Mangal,Uma. lcc BOOKS LB 1028.3 .M36 2009 0 0 lcc 0 0 MUC MUC GEN 2019-07-01 2604.00 1 LB 1028.3 .M36 2009 38913 2024-09-25 2024-09-13 2019-07-01 BOOKS 0 0 lcc 0 0 MUC MUC GEN 2019-07-01 2604.00 9 LB 1028.3 .M36 2009 38914 2024-12-11 2024-12-06 2019-07-01 BOOKS