@misc{indiciae69822dfb7327,
  title = {Geologic map of the Sand Hollow Quadrangle, Crook County, Oregon},
  author = {J. A. Ach and J.T. Bateson},
  year = {1991},
  doi = {10.3133/mf2156},
  url = {https://pubs.usgs.gov/publication/mf2156},
  note = {Source identifier: mf2156}
}