@misc{indiciaecfd693801bf4,
  title = {Geologic map and coal sections of the Birney Quadrangle, Rosebud County, Montana},
  author = {W. J. Mapel},
  year = {1976},
  doi = {10.3133/mf813},
  url = {https://pubs.usgs.gov/publication/mf813},
  note = {Source identifier: mf813}
}