000 00252nam a2200109Ia 4500
008 240421s9999 xx 000 0 und d
100 _aRastogi, Sudesh
245 0 _aGraha Vighyan
260 _aMeerut
_bChitra Prakashan
300 _a308p.
942 _cBK
999 _c14868
_d14868