@misc{indiciae555bec56e7df,
  title = {Perpendicular blade vortex interaction and its implications for helicopter noise prediction: Wave-number frequency spectra in a trailing vortex for BWI noise prediction},
  author = {Devenport, William J. and Glegg, Stewart A. L.},
  year = {1993},
  url = {https://ntrs.nasa.gov/citations/19940006297},
  note = {Source identifier: 19940006297}
}