@misc{indiciae511dd15a7e1e,
  title = {A User's guide to the automatic phase picking system for portable 3-component seismograph 5-day tapes},
  author = {M.L. Kauffmann},
  year = {1985},
  doi = {10.3133/ofr86109},
  url = {https://pubs.usgs.gov/publication/ofr86109},
  note = {Source identifier: ofr86109}
}