000 00254nam a2200109Ia 4500
008 190719s9999 xx 000 0 und d
100 _aS P Singh
245 0 _aSankhiyiki ke mool tatva
260 _aNew Delhi
_bS Chand
_c1984
650 _aMath
942 _cBK
999 _c5574
_d5574