@misc{indiciaed2ce12d75fd2,
  title = {Geologic and structure map of the southeastern part of the Powder River Basin, Wyoming},
  author = {C. E. Dobbin and William B. Kramer and George Henry Horn},
  year = {1957},
  doi = {10.3133/om185},
  url = {https://pubs.usgs.gov/publication/om185},
  note = {Source identifier: om185}
}