00278nam a2200121Ia 4500100001600000650001200016654001600028245004600044260003100090082001500121300000800136546001200144  aDutta/ B.N   aGeneral  aEstimating   aEatimating & Costing In Civil Engineering  bS.Chand co.aLucknowc1977  a624.1bDut  a898  aENGLISH