@misc{indiciaea6f378e27475,
  title = {MacRay; interactive two-dimensional seismic raytracing for the Macintosh},
  author = {James Howard Luetgert},
  year = {1992},
  doi = {10.3133/ofr92356},
  url = {https://pubs.usgs.gov/publication/ofr92356},
  note = {Source identifier: ofr92356}
}