@misc{indiciaee1f18c55c17b,
  title = {Flight evaluation of a computer aided low-altitude helicopter flight guidance system},
  author = {Swenson, Harry N. and Jones, Raymond D. and Clark, Raymond},
  year = {1993},
  url = {https://ntrs.nasa.gov/citations/19930019680},
  note = {Source identifier: 19930019680}
}