@misc{indiciae588a3a74c8f1,
  title = {Helicopter technology benefits and needs. Volume 2: Appendices},
  author = {Zuk, J. and Adams, R. J.},
  year = {1980},
  url = {https://ntrs.nasa.gov/citations/19830014970},
  note = {Source identifier: 19830014970}
}