000 00293nam a2200121Ia 4500
008 220201s1961 xx 000 0 eng d
082 _a511.8
_bGUP
100 _aGupta,R.
245 0 _aCommercial mathematics
260 _aCalcutta
_bAcademic publications
_c1961
300 _a525
942 _2ddc
999 _c15095
_d15095