000 00348nam a2200133Ia 4500
090 _c2651
_d2651
100 _aRay,Brati Sankar
245 _aIntroduction to differential calculas.
_cBrati Sankar Ray
250 _a2nd ed.
260 _aCalcutta:
_bScience BK Agency,
_c1961.
300 _aii,252 p.:
_bdia;
_c24 cm.
650 _aCalculas
942 _cBK
999 _c2550
_d2559