@misc{indiciaeafbc497dc2f0,
  title = {Description and history of mercury-tube tiltmeters used in the San Francisco Bay area, California},
  author = {Alan C. Jones},
  year = {1983},
  doi = {10.3133/ofr83463},
  url = {https://pubs.usgs.gov/publication/ofr83463},
  note = {Source identifier: ofr83463}
}