000 00256nam a2200109Ia 4500
008 190719s9999 xx 000 0 und d
100 _aD Singh
245 0 _aPlus 2 prarambhik sankhyiki
260 _aDelhi
_bP Chand
_c1985
650 _aEconomics
942 _cBK
999 _c5903
_d5903