@misc{indiciae662b201e554e,
  title = {Hydrology of Area 35, Eastern region, Interior coal province, Illinois and Kentucky},
  author = {E.E. Zuehls and G.L. Ryan and D.B. Peart and K. K. Fitzgerald},
  year = {1981},
  doi = {10.3133/ofr81403},
  url = {https://pubs.usgs.gov/publication/ofr81403},
  note = {Source identifier: ofr81403}
}