@misc{indiciaebe1bf1d1cb36,
  title = {Zoning of the Bitter Creek vanadium-uranium deposit near Uravan, Colorado},
  author = {Allen Van Heyl},
  year = {1957},
  doi = {10.3133/b1042f},
  url = {https://pubs.usgs.gov/publication/b1042F},
  note = {Source identifier: b1042F}
}