@misc{indiciaed08e309b201b,
  title = {Bedrock topography of Southwest Iowa},
  author = {Lyle Sendlein and Jack L. Gilmore},
  year = {1979},
  doi = {10.3133/ofr79686},
  url = {https://pubs.usgs.gov/publication/ofr79686},
  note = {Source identifier: ofr79686}
}