@misc{indiciae3acf1506a8c2,
  title = {Fluorine, fluorite, and fluorspar in central Colorado},
  author = {Alan R. Wallace},
  year = {2010},
  doi = {10.3133/sir20105113},
  url = {https://pubs.usgs.gov/publication/sir20105113},
  note = {Source identifier: sir20105113}
}