@misc{indiciae3ea30c017d03,
  title = {Carbonatite and alkaline intrusion-related rare earth element deposits\–A deposit model},
  author = {Philip L. Verplanck and Bradley S. Van Gosen},
  year = {2011},
  doi = {10.3133/ofr20111256},
  url = {https://pubs.usgs.gov/publication/ofr20111256},
  note = {Source identifier: ofr20111256}
}