@misc{indiciaedecf4cda39d5,
  title = {Maps showing the coal geology of the Sarpy Creek area, Big Horn and Treasure counties, Montana},
  author = {L. N. Robinson and B. S. Van Gosen},
  year = {1986},
  doi = {10.3133/mf1859},
  url = {https://pubs.usgs.gov/publication/mf1859},
  note = {Source identifier: mf1859}
}