@misc{indiciae8b3609c346f7,
  title = {Low-noise propulsion systems for subsonic transports},
  author = {Feiler, C. E. and Kramer, J. J. and Leanord, B. R.},
  year = {1969},
  url = {https://ntrs.nasa.gov/citations/19700024462},
  note = {Source identifier: 19700024462}
}