000			00305nam a2200133Ia 4500
008			190201s9999 xx 000 0 und d
020			_a9.78817E+12
100			_aDutta B.N.
245		0	_aEstimating and Costing I
260			_aLucknow
260			_bS.Dutta and Company
260			_c1989
300			_a906
999			_c20449 _d20449