@misc{indiciae40041eff7892,
  title = {Computer programs in HP 9845 BASIC for modeling and interpreting multiple-layer, plane-interface shallow refraction seismics},
  author = {W.P. Hasbrouck},
  year = {1990},
  doi = {10.3133/ofr90473},
  url = {https://pubs.usgs.gov/publication/ofr90473},
  note = {Source identifier: ofr90473}
}