@misc{indiciae4361fb969404,
  title = {The Iron Hill (Powderhorn) carbonatite complex, Gunnison County, Colorado — A potential source of several uncommon mineral resources},
  author = {Bradley S. Van Gosen},
  year = {2009},
  doi = {10.3133/ofr20091005},
  url = {https://pubs.usgs.gov/publication/ofr20091005},
  note = {Source identifier: ofr20091005}
}