000 00264nam a2200109Ia 4500
008 240421s9999 xx 000 0 und d
100 _aSharma, K.K.
245 0 _aEdcuational Technology
260 _aNew Delhi
_bMahaveer & Sons
_c2007
300 _a260
942 _cBK
999 _c15117
_d15117