000 00294nam a2200121Ia 4500
008 230222s9999 xx 000 0 und d
082 _a515.352
100 _aAhsan Akhtar
245 0 _aTextbook of Differential Calculus
250 _a1
260 _bPhi Learning, New Delhi
_c2009
942 _cBK
999 _c17303
_d17303