@misc{indiciae00a081d41b2f,
  title = {Propeller blade retention system},
  author = {Elston, III, Sidney B. and Simon, III, Victor H. and Tseng, Wu-Yang and Butler, Lawrence},
  year = {1993},
  url = {https://ntrs.nasa.gov/citations/20080004101},
  note = {Source identifier: 20080004101}
}