00463nam a2200157Ia 4500003000800000008004100008020001800049041001300067080001900080100001900099245007900118250000800197260004400205300002900249500002700278SLTCLib180423s9999    xx            000 0 und d  a9788125922933  aEnglish   a37.014.642AGG  aAggarwal, J.C.  aEssentials of Educational Technologyb innovations in teaching -learning    a2nd  aNew DelhibVikas Publishingc1995g2013  axii, 504 p.bill.c20 cm  aEducational Technology