@misc{indiciaed5d4a8e6308c,
  title = {Provenance of the upper Miocene and Pliocene Etchegoin Formation; implications for paleogeography of the late Miocene of Central California},
  author = {J.A. Perkins},
  year = {1987},
  doi = {10.3133/ofr87167},
  url = {https://pubs.usgs.gov/publication/ofr87167},
  note = {Source identifier: ofr87167}
}