@misc{indiciae55b3822917bc,
  title = {Computer technique for tracing seismic rays in two-dimensional geological models},
  author = {Nazieh K. Yacoub and James Henry Scott and F. A. McKeown},
  year = {1968},
  doi = {10.3133/ofr68334},
  url = {https://pubs.usgs.gov/publication/ofr68334},
  note = {Source identifier: ofr68334}
}