@misc{indiciae519f3c5c9b28,
  title = {Location of acoustic sources using seismological techniques and software},
  author = {J.C. Lahr and F.G. Fischer},
  year = {1993},
  doi = {10.3133/ofr93221},
  url = {https://pubs.usgs.gov/publication/ofr93221},
  note = {Source identifier: ofr93221}
}