@misc{indiciae8b2f62d472f6,
  title = {Bedrock topography of southwest Iowa},
  author = {Lyle Sendlein and Jack L. Gilmore},
  year = {1980},
  doi = {10.3133/i1222},
  url = {https://pubs.usgs.gov/publication/i1222},
  note = {Source identifier: i1222}
}