@misc{indiciae277ea69421d9,
  title = {Light aircraft sound transmission study},
  author = {Atwal, M. and David, J. and Heitman, K. and Crocker, M. J.},
  year = {1983},
  url = {https://ntrs.nasa.gov/citations/19840002842},
  note = {Source identifier: 19840002842}
}