@misc{indiciaea1d360c5e9f5,
  title = {Selected geologic information from drill holes in southeastern Iowa},
  author = {Daniel J. Gockel},
  year = {1979},
  doi = {10.3133/ofr79415},
  url = {https://pubs.usgs.gov/publication/ofr79415},
  note = {Source identifier: ofr79415}
}