@misc{indiciae007b778b333e,
  title = {Recent research on powered-lift STOL ground effects},
  author = {Campbell, J. P. and Hassell, J. L., Jr. and Thomas, J. L.},
  year = {1977},
  url = {https://ntrs.nasa.gov/citations/19770052082},
  note = {Source identifier: 19770052082}
}