@misc{indiciae78e14a5bdd87,
  title = {Preliminary geologic map of the Burns and West Myrtle Butte 15-minute quadrangles, Oregon},
  author = {R. C. Greene},
  year = {1972},
  doi = {10.3133/mf320},
  url = {https://pubs.usgs.gov/publication/mf320},
  note = {Source identifier: mf320}
}