@misc{indiciae5180246ecada,
  title = {Reconnaissance geologic map of the Pendleton Quadrangle, Oregon and Washington},
  author = {G. W. Walker},
  year = {1973},
  doi = {10.3133/i727},
  url = {https://pubs.usgs.gov/publication/i727},
  note = {Source identifier: i727}
}