@misc{indiciaeb628981692ae,
  title = {Principal facts for gravity stations in the San Francisco Bay area, California},
  author = {Gordon M. Greve and William G. Clement},
  year = {1963},
  doi = {10.3133/ofr6338},
  url = {https://pubs.usgs.gov/publication/ofr6338},
  note = {Source identifier: ofr6338}
}