Sustainable growth in America's heartland - 3-D geologic maps as the foundation. - Central Great Lakes Geologic Mapping Coalition; Illinois State Geological Survey; Indiana Geological Survey; Michigan Geological Survey Division; Ohio Division of Geological Survey; U.S.Geological Survey (USGS). (Denver, Colorado, U.S.A. U.S. Geological Survey, 1999)
Keywords: Geological mapping - Middle West; Geology - Middle West; Glacial landforms - Middle West