@misc{indiciaee8a44a5154f7,
  title = {The occurrence of fuller's earth in the United States},
  author = {David T. Day},
  year = {1900},
  doi = {10.1016/s0016-0032(00)90205-9},
  url = {https://pubs.usgs.gov/publication/70009951},
  note = {Source identifier: 70009951}
}