@misc{indiciaeb7fa6150e722,
  title = {Analytical data on the Phosphoria Formation, western United States},
  author = {Robert A. Gulbrandsen},
  year = {1975},
  doi = {10.3133/ofr75554},
  url = {https://pubs.usgs.gov/publication/ofr75554},
  note = {Source identifier: ofr75554}
}