@misc{indiciaefb9a97b9e643,
  title = {Preliminary maps of Quaternary deposits and liquefaction susceptibility, nine-county San Francisco Bay region, California: a digital database},
  author = {Keith L. Knudsen and Janet M. Sowers and Robert C. Witter and Carl M. Wentworth and Edward J. Helley and Robert S. Nicholson and Heather M. Wright and Katherine H. Brown},
  year = {2000},
  doi = {10.3133/ofr00444},
  url = {https://pubs.usgs.gov/publication/ofr00444},
  note = {Source identifier: ofr00444}
}