000 00302nam a22001217a 4500
003 OSt
008 230722b |||||||| |||| 00| 0 eng d
082 _a517
_bW46A
100 _aWidder, D.V.
245 _aAdvanced Calculas
260 _aNew Delhi
_PPatience Hall of India pvt. Ltd
_c1976
942 _2ddc
_cBK
999 _c29113
_d29113