@misc{indiciae707247054681,
  title = {General flow field analysis methods for helicopter rotor aeroacoustics},
  author = {Quackenbush, Todd R. and Lam, C. Gordon and Bliss, Donald B.},
  year = {1991},
  url = {https://ntrs.nasa.gov/citations/19910034753},
  note = {Source identifier: 19910034753}
}