00410nam a2200145 a 450000500170000010000190001724500620003626000210009830000180011969000270013796400190016499700120018399900170019595200520021220251203090651.0  aKulkarni, K.K.  aIntroduction to educational technology, S.S.Kulkarni, eng  aOxford,IBHc1986  a479p.c24 cm.  aEducational technology  bEngcdefg_  a26879 W  c15637d15637  02104070aPUbPUd1998-07-16l0o p26879yBK