Leffel & Co, James The Construction of Mill Dams; Comprising Also the Building of Race and Reservoir Embankments and Head Gates, the Measurement of Streams, Gauging of Water Supply, &c Illustrated Catalogue. Jas. Leffel's American Double Turbine Water Wheel, Manufactured by Leffel & Myers, at the Oregon Iron Works, Portland, Oregon Sök bara efter: Leffel
