@misc{indiciae659a61988261,
  title = {Study of V/STOL aircraft implementation. Volume 1: Summary},
  author = {Portenier, W. J. and Webb, H. M.},
  year = {1973},
  url = {https://ntrs.nasa.gov/citations/19730010290},
  note = {Source identifier: 19730010290}
}