@misc{indiciaeb5318fd360bd,
  title = {Kaolin, refractory clay, ball clay, and halloysite in North America, Hawaii, and the Caribbean region},
  author = {S. H. Patterson and H.H. Murray},
  year = {1984},
  doi = {10.3133/pp1306},
  url = {https://pubs.usgs.gov/publication/pp1306},
  note = {Source identifier: pp1306}
}