@misc{indiciae6bb3dda0ea0b,
  title = {Geologic map of the Mount Vernon quadrangle, Grant County, Oregon},
  author = {C. Ervin Brown and Thomas Prence Thayer},
  year = {1966},
  doi = {10.3133/gq548},
  url = {https://pubs.usgs.gov/publication/gq548},
  note = {Source identifier: gq548}
}