@misc{indiciaedb4d26fd6190,
  title = {Propeller/fan-pitch feathering apparatus},
  author = {Schilling, Jan C. and Adamson, Arthur P. and Bathori, Julius and Walker, Neil},
  year = {1990},
  url = {https://ntrs.nasa.gov/citations/20080008779},
  note = {Source identifier: 20080008779}
}