@misc{indiciae6bf19b59114b,
  title = {Occurrence of diatomaceous earth near Kenai, Alaska},
  author = {George Plafker},
  year = {1956},
  doi = {10.3133/b1039b},
  url = {https://pubs.usgs.gov/publication/b1039B},
  note = {Source identifier: b1039B}
}