@misc{indiciae304ba3d0db8d,
  title = {Map showing mineral resources of the San Francisco Bay region, California: Present availability and planning for the future},
  author = {Edgar H. Bailey and Deborah R. Harden},
  year = {1975},
  doi = {10.3133/i909},
  url = {https://pubs.usgs.gov/publication/i909},
  note = {Source identifier: i909}
}