@misc{indiciaeaed59f3f7b69,
  title = {Sound propagation through a variable area duct - Experiment and theory},
  author = {Silcox, R. J. and Lester, H. C.},
  year = {1981},
  url = {https://ntrs.nasa.gov/citations/19810065342},
  note = {Source identifier: 19810065342}
}