00294nam a2200097Ia 4500008004100000100001600041245007700057260004500134260000900179300000800188200302s9999    xx            000 0 und d  aB. N. Dutta  aEstimating and costing in civil engineering theory and practice 28th ed.  bU B S  Publishers Distributors Pvt. Ltd.  c2017  a904