000 00307nam a2200121Ia 4500
008 220201s1981 xx 000 0 eng d
082 _a628.1
_bBIR
100 _aG.S. Birdi
245 0 _aTextbook of estimating and costing
260 _aNew Delhi
_bDhanpat Rai and sons
_c1981
300 _a792
942 _2ddc
999 _c22593
_d22593