@misc{indiciaed8e99ac126c2,
  title = {Chemical composition of phosphorites of the Phosphoria Formation},
  author = {R. A. Gulbrandsen},
  year = {1966},
  doi = {10.1016/0016-7037(66)90131-1},
  url = {https://pubs.usgs.gov/publication/70010041},
  note = {Source identifier: 70010041}
}