@misc{indiciae46ebd16f80d5,
  title = {A teacher's guide to the San Francisco Bay area geophysics maps (U.S. Geological Survey GP-1006 and GP-1007)},
  author = {V.E. Langenheim and L. C. Gordon},
  year = {1995},
  doi = {10.3133/ofr95479},
  url = {https://pubs.usgs.gov/publication/ofr95479},
  note = {Source identifier: ofr95479}
}