@misc{indiciae13f8be0ea4f6,
  title = {Petrography of radioactive Tertiary igneous rocks, Front Range mineral belt, Colorado},
  author = {John David Wells},
  year = {1960},
  doi = {10.3133/b1032e},
  url = {https://pubs.usgs.gov/publication/b1032E},
  note = {Source identifier: b1032E}
}