@misc{indiciaef6bb5f0e75d3,
  title = {Propeller aircraft interior noise model. II - Scale-model and flight-test comparisons},
  author = {Willis, C. M. and Mayes, W. H.},
  year = {1987},
  url = {https://ntrs.nasa.gov/citations/19880036532},
  note = {Source identifier: 19880036532}
}