000 00251nam a2200109Ia 4500
008 240421s9999 xx 000 0 und d
100 _aSharma, B.L.
245 0 _aGraha Vighyan Shikshan
260 _aMeerut
_bRLB
_c2010
300 _a336p.
942 _cBK
999 _c12594
_d12594