000			00303nam a2200109Ia 4500
008			201201s9999 xx 000 0 und d
082			_a624.1042
100			_aDUTTA, B.N.
245		0	_aESTIMATING AND COSTING IN CIVIL ENGINEERING THEORY AND PRACTICE
260			_bLUCKNOW, B.N. DUTTA _c1969
942			_cOB
999			_c17097 _d17097