@misc{indiciae2949679d16b3,
  title = {Catalog of locations of USGS instruments recording low-frequency data in California, 1980},
  author = {William B. Daul and M. J. Johnston},
  year = {1980},
  doi = {10.3133/ofr80704},
  url = {https://pubs.usgs.gov/publication/ofr80704},
  note = {Source identifier: ofr80704}
}