000 00258nam a2200109Ia 4500
008 190719s9999 xx 000 0 und d
100 _aSatyaparkash Gupt
245 0 _aSankhyaki ke siddhant
260 _aDelhi
_bS Chand
_c1971
650 _aEconomics
942 _cBK
999 _c759
_d759