@misc{indiciae7292843c3e62,
  title = {California earthquakes: Why only shallow focus?},
  author = {W.F. Brace and J.D. Byerlee},
  year = {1970},
  doi = {10.1126/science.168.3939.1573},
  url = {https://pubs.usgs.gov/publication/70010284},
  note = {Source identifier: 70010284}
}