@misc{indiciaeace74a63a4f1,
  title = {Aircraft noise source and computer programs - User's guide},
  author = {Crowley, K. C. and Jaeger, M. A. and Meldrum, D. F.},
  year = {1973},
  url = {https://ntrs.nasa.gov/citations/19730023214},
  note = {Source identifier: 19730023214}
}