@misc{indiciae0cb34ae8bee3,
  title = {Exact Solutions for Sound Radiation from a Circular Duct},
  author = {Cho, Y. C. and Ingard, K. Uno},
  year = {1997},
  url = {https://ntrs.nasa.gov/citations/19970024844},
  note = {Source identifier: 19970024844}
}