@misc{indiciae6079bfc004ac,
  title = {Inviscid flow field induced by a rotor in ground effect},
  author = {Greenberg, M. D. and Kaskel, A. L.},
  year = {1968},
  url = {https://ntrs.nasa.gov/citations/19680013006},
  note = {Source identifier: 19680013006}
}