@misc{indiciaeb2cbd46cd0be,
  title = {Geologic maps and sections of part of the Philipsburg district, Granite County, Montana},
  author = {William C. Prinz},
  year = {1963},
  doi = {10.3133/ofr63110},
  url = {https://pubs.usgs.gov/publication/ofr63110},
  note = {Source identifier: ofr63110}
}