@misc{indiciae1b6f7a09522e,
  title = {Geologic map of the Lusk Creek Roadless Area, Pope County, Illinois},
  author = {J. S. Klasner},
  year = {1982},
  doi = {10.3133/mf1405a},
  url = {https://pubs.usgs.gov/publication/mf1405A},
  note = {Source identifier: mf1405A}
}