000 00249nam a2200109Ia 4500
008 240421s9999 xx 000 0 und d
100 _aAggarwal, B.M.
245 0 _aGraha Vighyan Shikshan
260 _aJaipur
_bSwati
300 _a167p.
942 _cBK
999 _c13074
_d13074