000 00270nam a2200121Ia 4500
008 210212s9999 xx 000 0 und d
040 _crty
100 _aSaxena HC ang Gupta K.C
245 0 _aDifferential Calculus
260 _aNew Delhi
300 _a1992
942 _cBB
999 _c1515
_d1515