@misc{indiciae2c30abaab76a,
  title = {STOL propulsion systems},
  author = {Denington, R. J. and Koenig, R. W. and Vanco, M. R. and Sagerser, D. A.},
  year = {1972},
  url = {https://ntrs.nasa.gov/citations/19730024234},
  note = {Source identifier: 19730024234}
}