@misc{indiciae90da0ef594db,
  title = {Geologic, radiometric, and mineralogic maps and underground workings of the Schwartzwalder uranium mine and area, Jefferson County, Colorado},
  author = {Edward J. Young},
  year = {1977},
  doi = {10.3133/ofr77725},
  url = {https://pubs.usgs.gov/publication/ofr77725},
  note = {Source identifier: ofr77725}
}