00325nam a2200109Ia 4500008004100000041000800041082001000049100001500059245006500074260005700139999001900196231107s1990    xx            000 0 und d  aeng  a692.5  aDatta,B.N.  aEstimating & Costing in Civil Engineering: Theory & Practice  aNew DelhibUBS Publishers Distributers Pvt.Ltdc1990  c922024d922024