@misc{indiciae2052ac5e0d4b,
  title = {Hydrology of Area 31, eastern region, interior coal province, Illinois and Indiana},
  author = {E.E. Zuehls},
  year = {1986},
  doi = {10.3133/ofr85342},
  url = {https://pubs.usgs.gov/publication/ofr85342},
  note = {Source identifier: ofr85342}
}