@misc{indiciaee6e1bdb31e7e,
  title = {Preliminary geologic map of part of the Wallace 1:250,000 sheet, Idaho-Montana},
  author = {J. E. Harrison and A. B. Griggs and J. D. Wells},
  year = {1974},
  doi = {10.3133/ofr7437},
  url = {https://pubs.usgs.gov/publication/ofr7437},
  note = {Source identifier: ofr7437}
}