@misc{indiciaecf36826e1c6c,
  title = {Preliminary geologic map of the Rodgers Pass area, Lewis and Clark County, Montana},
  author = {James W. Whipple},
  year = {1979},
  doi = {10.3133/ofr79719},
  url = {https://pubs.usgs.gov/publication/ofr79719},
  note = {Source identifier: ofr79719}
}