000			00310nam a22001457a 4500
003			OSt
020			_aNA
040			_c0
082			_222 _a692.5
100			_aDutta, B. N.
245			_aEstimating and costing in civil engineering /
260			_bUBSPD, _cc2005.
300			_a0 _bill. ;
942			_2ddc _cCIVIL _03
999			_c4471 _d4471