@misc{indiciaeea83f1d0d005,
  title = {Geologic map of the Frederick Butte volcanic center, Deschutes and Lake Counties, south-central Oregon},
  author = {J. A. Johnson},
  year = {1998},
  doi = {10.3133/ofr98208},
  url = {https://pubs.usgs.gov/publication/ofr98208},
  note = {Source identifier: ofr98208}
}