@misc{indiciae7e7f5edf0b1b,
  title = {Bouguer gravity map of northeastern San Francisco Bay region, California},
  author = {C. W. Roberts and S. L. Robbins and R. H. Chapman},
  year = {1977},
  doi = {10.3133/mf780b},
  url = {https://pubs.usgs.gov/publication/mf780B},
  note = {Source identifier: mf780B}
}