@misc{indiciaeca7ee85a8034,
  title = {Preliminary geologic map of the northern Elkhorn Mountains, Jefferson and Broadwater Counties, Montana},
  author = {Harry W. Smedes},
  year = {1962},
  doi = {10.3133/mf243},
  url = {https://pubs.usgs.gov/publication/mf243},
  note = {Source identifier: mf243}
}