@misc{indiciae69e3eee77ac7,
  title = {Geology and coal resources of the Hanging Woman Creek Study Area, Big Horn and Powder River Counties, Montana},
  author = {William Craven Culbertson and Joseph R. Hatch and Ronald H. Affolter},
  year = {1978},
  doi = {10.3133/ofr78506},
  url = {https://pubs.usgs.gov/publication/ofr78506},
  note = {Source identifier: ofr78506}
}