@misc{indiciae0aba4d532381,
  title = {Quiet engine program flight engine design study},
  author = {Klapproth, J. F. and Neitzel, R. E. and Seeley, C. T.},
  year = {1974},
  url = {https://ntrs.nasa.gov/citations/19740025113},
  note = {Source identifier: 19740025113}
}