@misc{indiciaeb71b53fdf5ec,
  title = {Geologic maps of the northern and western parts of Gallatin National Forest, Montana; digital and hard copy formats},
  author = {Anna B. Wilson and James E. Elliott},
  year = {1995},
  doi = {10.3133/ofr9511b},
  url = {https://pubs.usgs.gov/publication/ofr9511B},
  note = {Source identifier: ofr9511B}
}