@misc{indiciae924d86d9db44,
  title = {Review of the geology of the Sioux Uplift and Iowa shelf provinces as a basis for estimates of undiscovered hydrocarbon resources},
  author = {J. R. Hatch},
  year = {1988},
  doi = {10.3133/ofr88450v},
  url = {https://pubs.usgs.gov/publication/ofr88450V},
  note = {Source identifier: ofr88450V}
}