@misc{indiciae234da55305d7,
  title = {Geology and mineral resources of parts of Carbon, Big Horn, Yellowstone and Stillwater Counties, Montana},
  author = {R. S. Knappen and G. F. Moulton},
  year = {1931},
  doi = {10.3133/b822a},
  url = {https://pubs.usgs.gov/publication/b822A},
  note = {Source identifier: b822A}
}