@misc{indiciae524d295cdfc7,
  title = {Impact absorbing blade mounts for variable pitch blades},
  author = {Ravenhall, R. and Salemme, C. T. and Adamson, A. P.},
  year = {1977},
  url = {https://ntrs.nasa.gov/citations/19780002525},
  note = {Source identifier: 19780002525}
}