@misc{indiciaeefb1212ad2c1,
  title = {Program HPLT--an interactive hypocenter plotting program for the Eclipse computer},
  author = {Fred W. Klein},
  year = {1978},
  doi = {10.3133/ofr78726},
  url = {https://pubs.usgs.gov/publication/ofr78726},
  note = {Source identifier: ofr78726}
}