@misc{indiciaee5a7543e489b,
  title = {Exploration of the Big Boulder prospect, Larimer County, Colorado},
  author = {W. R. Thurston},
  year = {1951},
  doi = {10.3133/ofr5145},
  url = {https://pubs.usgs.gov/publication/ofr5145},
  note = {Source identifier: ofr5145}
}