00265nam a2200097Ia 450000500170000000800410001705000160005810000160007424500510009026000260014120251229182502.0251229s9999    xx            000 0 und d  aTA 183 .S74  aStewart R.D 0aMicroestimating for civil engineerscD Stewart  aUSA  McGrwa-Hill 1986