@misc{indiciaefc91b17038b6,
  title = {Sustainable growth in America's heartland: 3-D geologic maps as the foundation},
  author = {Central Great Lakes Geologic Mapping Coalition and Illinois State Geological Survey and Indiana Geological Survey and Michigan Geological Survey Division and Ohio Division of Geological Survey and Members of the Engineering Geology and Ground Water Branches, U.S. Geological Survey},
  year = {1999},
  doi = {10.3133/cir1190},
  url = {https://pubs.usgs.gov/publication/cir1190},
  note = {Source identifier: cir1190}
}