@misc{indiciaeac07fbda4ceb,
  title = {Marine chemistry of the permian phosphoria formation and basin, Southeast Idaho},
  author = {D.Z. Piper},
  year = {2001},
  doi = {10.2113/96.3.599},
  url = {https://pubs.usgs.gov/publication/70023960},
  note = {Source identifier: 70023960}
}