@misc{indiciae6d12fab419cd,
  title = {Preliminary geologic map of the Sheridan Quadrangle, Sheridan County, Wyoming},
  author = {E. N. Hinrichs},
  year = {1978},
  doi = {10.3133/mf1018},
  url = {https://pubs.usgs.gov/publication/mf1018},
  note = {Source identifier: mf1018}
}