@misc{indiciaec270d02809d4,
  title = {HYPO71: a computer program for determining hypocenter, magnitude, and first motion pattern of local earthquakes},
  author = {William Hung Kan Lee and John C. Lahr},
  year = {1972},
  doi = {10.3133/ofr72224},
  url = {https://pubs.usgs.gov/publication/ofr72224},
  note = {Source identifier: ofr72224}
}