000 00263nam a2200109Ia 4500
008 240421s9999 xx 000 0 und d
100 _aMangal, S.K .
245 0 _aEseentails Of Education Technology
260 _aDelhi
_bPHI
_c2013
300 _a812p.
942 _cBK
999 _c15520
_d15520