000 00294nam a2200133Ia 4500
008 230321s9999 xx 000 0 und d
082 _a370
_bMAN
100 _aMangal, S.K
245 0 _aEssential of Education Technology
250 _a1st
260 _bPHI
_c2009
300 _a812
942 _cBK
999 _c2488
_d2488