@misc{indiciae9019c1ff62c6,
  title = {Preliminary study of the coal deposits in the Circle area, McCone, Dawson, and Garfield counties, Montana},
  author = {Herbert Wincentsen},
  year = {1978},
  doi = {10.3133/ofr78367},
  url = {https://pubs.usgs.gov/publication/ofr78367},
  note = {Source identifier: ofr78367}
}