@misc{indiciae4c7b023ce9e9,
  title = {Geologic map of the Du Noir area, Fremont County, Wyoming},
  author = {William Richard Keefer},
  year = {1955},
  doi = {10.3133/om166},
  url = {https://pubs.usgs.gov/publication/om166},
  note = {Source identifier: om166}
}