@misc{indiciae0474cf6b6416,
  title = {The Central Great Lakes Geologic Mapping Coalition},
  author = {Members of the Engineering Geology and Ground Water Branches, U.S. Geological Survey},
  year = {1999},
  doi = {10.3133/fs15399},
  url = {https://pubs.usgs.gov/publication/fs15399},
  note = {Source identifier: fs15399}
}