@misc{indiciae799a49ffe019,
  title = {Reconnaissance for radioactivity in the metal-mining districts of the San Juan Mountains, Colorado},
  author = {Charles Thomas Pierson and W.F. Weeks and F. J. Kleinhampl},
  year = {1956},
  doi = {10.3133/tei306},
  url = {https://pubs.usgs.gov/publication/tei306},
  note = {Source identifier: tei306}
}