@misc{indiciaea71d5c490d6a,
  title = {Assessment of a wake vortex flight test program},
  author = {Spangler, S. B. and Dillenius, M. F. E. and Schwind, R. G. and Nielsen, J. N.},
  year = {1974},
  url = {https://ntrs.nasa.gov/citations/19740022305},
  note = {Source identifier: 19740022305}
}