000 00234nam a2200097Ia 4500
008 220606s9999 xx 000 0 und d
245 0 _aSAMAJIK VIGYAN SANSADHAN EVM VIKAS
260 _bDELHI NCERT
_c2008
300 _a75
942 _cBK
999 _c106389
_d106389