@misc{indiciae0751702cda60,
  title = {Computational methods for studying acoustic propagation in nonuniform waveguides.},
  author = {Beckemeyer, R. J. and Eversman, W.},
  year = {1973},
  url = {https://ntrs.nasa.gov/citations/19730060037},
  note = {Source identifier: 19730060037}
}