000 00250nam a2200109Ia 4500
008 190719s9999 xx 000 0 und d
100 _aD P Jain
245 0 _aVyavasaik sankhyiki
260 _aNew Delhi
_bR Chand
_c2000
650 _aMath
942 _cBK
999 _c10437
_d10437