@misc{indiciae5ce1b07728dc,
  title = {Pumice deposits of the Klamath Indian Reservation, Klamath County, Oregon},
  author = {George Walton Walker},
  year = {1951},
  doi = {10.3133/cir128},
  url = {https://pubs.usgs.gov/publication/cir128},
  note = {Source identifier: cir128}
}