000 00297nam a2200121Ia 4500
008 220201s1981 xx 000 0 eng d
082 _a624.1042
_bCHA
100 _aCharaya,JS&Narang,GS
245 0 _aT.B of estimating & costing
260 _bSatya prakasham
_c1981
300 _a255
942 _2ddc
999 _c82987
_d82987