@misc{indiciae0bd605cba10a,
  title = {Principal Facts for Gravity Stations in the San Francisco Bay Area, California},
  author = {G.M. Greve and W. G. Clement},
  year = {1971},
  doi = {10.3133/70046224},
  url = {https://pubs.usgs.gov/publication/70046224},
  note = {Source identifier: 70046224}
}