@misc{indiciae56bb3a02fa31,
  title = {Geologic map of iron deposits near Copper Mountain, Madison County, Montana; Magnetic and geologic map of iron deposits near Copper Mountain, Madison County, Montana},
  author = {Harold Lloyd James},
  year = {1962},
  doi = {10.3133/ofr6265},
  url = {https://pubs.usgs.gov/publication/ofr6265},
  note = {Source identifier: ofr6265}
}