prepared by the Wisconsin Geological and Natural History Survey and University of Wisconsin-Madison, Department of Geology and Geophysics, in conjunction with the North-Central Section, Geological Society of America meeting, held in Madison, Wisconsin, May 1-2, 1997
prepared by the Southeastern Wisconsin Regional Planning Commission, and Wisconsin Geological and Natural History Survey, and U.S. Geological Survey, Wisconsin District
with chapters by Dick Barrows [and others] ; prepared by Wisconsin Department of Natural Resources and University of Wisconsin-Extension, Geological and Natural History Survey