@misc{indiciae4138b4c2b70c,
  title = {Records of drill holes from drilling in Dubuque County, Iowa, by the U.S. Geological Survey, 1955},
  author = {C. Ervin Brown and Jesse W. Whitlow},
  year = {1956},
  doi = {10.3133/ofr5615},
  url = {https://pubs.usgs.gov/publication/ofr5615},
  note = {Source identifier: ofr5615}
}