@misc{indiciaeec03114d1657,
  title = {Fan noise suppression},
  author = {Feiler, C. E. and Groeneweg, J. F. and Rice, E. J. and Smith, E. B. and Tucker, R. H.},
  year = {1972},
  url = {https://ntrs.nasa.gov/citations/19730003288},
  note = {Source identifier: 19730003288}
}