000 00310nam a2200133Ia 4500
008 131111s9999 xx 000 0 und d
100 _aV K Rao
245 _aEducatuonal technology
260 _aNew Delhi
260 _bA P H
260 _c2004
650 _aEducation ,Education technology
763 _a32787
999 _c46597
_d46597