Hydrographic map of the Oconomowoc-Waukesha Lake district, WaukeshaCo., Wis.,prepared from surveys by the Wisconsin Geological and natural history survey. E.A. Birge, PH.D. director. Hydrography in charge of L.S. Smith, C.E. Field work by L.S. Smith & H.M. Trippe
Wisconsin Geological and Natural History Survey; Smith, Leonard Sewall,1864-; Trippe, H. M