@misc{indiciae91790c622d6f,
  title = {Preliminary results of radiometric reconnaissance of parts of the northwestern San Juan Mountains, Colorado},
  author = {Wilbur S. Burbank and Charles Thomas Pierson},
  year = {1953},
  doi = {10.3133/cir236},
  url = {https://pubs.usgs.gov/publication/cir236},
  note = {Source identifier: cir236}
}