@misc{indiciae428f3f106f0a,
  title = {Nonlinear acoustic propagation in rectangular ducts},
  author = {Nayfeh, A. H. and Tsai, M.-S.},
  year = {1974},
  url = {https://ntrs.nasa.gov/citations/19740051610},
  note = {Source identifier: 19740051610}
}