@misc{indiciae109941683b99,
  title = {Geologic, geochemical, and mineral resource assessment maps of the Garden of the Gods Roadless Area, Gallatin, Hardin, Pope, and Saline counties, Illinois},
  author = {J. S. Klasner and G.W. Day},
  year = {1986},
  doi = {10.3133/mf1801},
  url = {https://pubs.usgs.gov/publication/mf1801},
  note = {Source identifier: mf1801}
}