@misc{indiciaed1c8f53c7cb6,
  title = {Geology of oil-impregnated diatomaceous rock near Casmalia, Santa Barbara County, California},
  author = {M. Dean Williams and Clifford Norton Holmes},
  year = {1945},
  doi = {10.3133/om34},
  url = {https://pubs.usgs.gov/publication/om34},
  note = {Source identifier: om34}
}