@misc{indiciae8ec4ec1eaeba,
  title = {Rotor tip vortex geometry measurements using the wide-field shadowgraph technique},
  author = {Norman, T. R. and Light, J. S.},
  year = {1986},
  url = {https://ntrs.nasa.gov/citations/19860064842},
  note = {Source identifier: 19860064842}
}