@misc{indiciae03d1d78dc0fe,
  title = {Geologic map of the Rudolph Hill quadrangle, Gunnison, Hinsdale, and Saguache Counties, Colorado},
  author = {Jerry Chipman Olson},
  year = {1973},
  doi = {10.3133/ofr73213},
  url = {https://pubs.usgs.gov/publication/ofr73213},
  note = {Source identifier: ofr73213}
}