@misc{indiciae3d6f74cb0e67,
  title = {Simulating Unpowered Helicopter Landings},
  author = {Decker, William A. and Adam, Charles F. and Gerdes, Ronald M.},
  year = {1988},
  url = {https://ntrs.nasa.gov/citations/19880000310},
  note = {Source identifier: 19880000310}
}