@misc{indiciae9db1fb65dfc0,
  title = {Geology of the area adjacent to the Free Enterprise mine, Jefferson County, Montana},
  author = {Wayne A. Roberts and Arthur J. Gude},
  year = {1953},
  doi = {10.3133/b988g},
  url = {https://pubs.usgs.gov/publication/b988G},
  note = {Source identifier: b988G}
}