@misc{indiciaedc90cb7be155,
  title = {Acoustic plane waves normally incident on a clamped panel in a rectangular duct},
  author = {Unz, H. and Roskam, J.},
  year = {1979},
  url = {https://ntrs.nasa.gov/citations/19790023884},
  note = {Source identifier: 19790023884}
}