@misc{indiciaef305ddd62b32,
  title = {International Strategic Minerals Inventory summary report; phosphate},
  author = {Ulrich H. Krauss and Henning G. Saam and Helmut Schmidt},
  year = {1984},
  doi = {10.3133/cir930c},
  url = {https://pubs.usgs.gov/publication/cir930C},
  note = {Source identifier: cir930C}
}