@misc{indiciae0dcb02de9e9e,
  title = {User's manual for RAY84/R83PLT interactive two-dimensional raytracing/synthetic seismogram package},
  author = {J.H. Luetgert},
  year = {1988},
  doi = {10.3133/ofr88238},
  url = {https://pubs.usgs.gov/publication/ofr88238},
  note = {Source identifier: ofr88238}
}