@misc{indiciaedde6973c8e3d,
  title = {Wave propagation in ducts using the finite element method},
  author = {Majjigi, R. K. and Sigman, R. K. and Zinn, B. T.},
  year = {1979},
  url = {https://ntrs.nasa.gov/citations/19790042866},
  note = {Source identifier: 19790042866}
}