@misc{indiciae4e20d3a99efa,
  title = {Map showing principal debris-flow source areas in the San Francisco Bay region, California},
  author = {Stephen D. Ellen and Robert K. Mark and Gerald F. Wieczorek and Carl M. Wentworth and David W. Ramsey and Thomas E. May},
  year = {1997},
  doi = {10.3133/ofr97745e},
  url = {https://pubs.usgs.gov/publication/ofr97745E},
  note = {Source identifier: ofr97745E}
}