@misc{indiciae190d5bcea27f,
  title = {The Richey-Lambert coal field, Richland and Dawson Counties, Montana},
  author = {F.S. Parker},
  year = {1936},
  doi = {10.3133/b847c},
  url = {https://pubs.usgs.gov/publication/b847C},
  note = {Source identifier: b847C}
}