@misc{indiciae515880dfe3fc,
  title = {Preliminary geologic map of the Hells Canyon area, Adams and Idaho Counties, Idaho, and Wallowa County, Oregon},
  author = {James Louis Gualtieri and George Clarke Simmons},
  year = {1978},
  doi = {10.3133/ofr78805},
  url = {https://pubs.usgs.gov/publication/ofr78805},
  note = {Source identifier: ofr78805}
}