@misc{indiciae4a72bb9cc759,
  title = {Nonlinear effects on sound in nearly sonic duct flows},
  author = {Callegari, A. J. and Myers, M. K.},
  year = {1977},
  url = {https://ntrs.nasa.gov/citations/19770068201},
  note = {Source identifier: 19770068201}
}