@misc{indiciae3627fa2a9839,
  title = {Geology of the Mississippian aquifer in Iowa},
  author = {P. J. Horick and W. L. Steinhilber},
  year = {1973},
  doi = {10.3133/mf3},
  url = {https://pubs.usgs.gov/publication/70168642},
  note = {Source identifier: 70168642}
}