@misc{indiciae1dcb74eec2c3,
  title = {Geology and coal resources of the Livingston coal field, Gallatin and Park Counties, Montana},
  author = {A. E. Roberts},
  year = {1966},
  doi = {10.3133/pp526a},
  url = {https://pubs.usgs.gov/publication/pp526A},
  note = {Source identifier: pp526A}
}