@misc{indiciae68e7d7590c3a,
  title = {Seismicity maps of the San Francisco and San Jose 1 degree by 2 degrees Quadrangles, California, for the period 1967-1993},
  author = {S.R. Walter and D. H. Oppenheimer and R.I. Mandel},
  year = {1998},
  doi = {10.3133/i2580},
  url = {https://pubs.usgs.gov/publication/i2580},
  note = {Source identifier: i2580}
}