@misc{indiciae378a01b98b4c,
  title = {Reconnaissance geologic map of the Hamen quadrangle, Meagher County, Montana},
  author = {Val L. Freeman},
  year = {1977},
  doi = {10.3133/ofr77137},
  url = {https://pubs.usgs.gov/publication/ofr77137},
  note = {Source identifier: ofr77137}
}