000 00281nam a2200109Ia 4500
008 190719s9999 xx 000 0 und d
100 _aR P Gupta & others
245 0 _aText book on differential calculus
260 _aGhaziabad
_bVimal Prakashan
_c1975
650 _aMath
942 _cBK
999 _c2677
_d2677