000 00291nam a2200121Ia 4500
008 220201s1981 xx 000 0 eng d
082 _a624.1042
_bCHA
100 _aCharya & Narang
245 0 _aTb of estimating & costing
260 _bSatya Prakashan
_c1981
300 _a254
942 _2ddc
999 _c81748
_d81748