000 00273nam a2200109Ia 4500
008 211214s9999 xx 000 0 und d
100 _aMaheshwari, V.K. and others
245 _aEssentials of Educational Technology
260 _bR.Lall
_c1900
300 _a676
942 _cBK
999 _c52633
_d52633