@misc{indiciae6f0a6382d404,
  title = {Stratigraphy and paleoenvironment of Miocene phosphatic rocks in the East San Francisco Bay region, California},
  author = {James M. Hill},
  year = {1979},
  doi = {10.3133/ofr791570},
  url = {https://pubs.usgs.gov/publication/ofr791570},
  note = {Source identifier: ofr791570}
}