@misc{indiciaeb9283b32e16c,
  title = {Phosphate rock in the Three Forks-Yellowstone Park region, Montana},
  author = {D. Dale Condit and E.H. Finch and J. T. Pardee},
  year = {1927},
  doi = {10.3133/b795g},
  url = {https://pubs.usgs.gov/publication/b795G},
  note = {Source identifier: b795G}
}