@misc{indiciaeb7fcc8e49abd,
  title = {Progress report on wing-trailing-vortex studies},
  author = {Benner, M. S. and Dunham, R. E., Jr. and Verstynen, H. A., Jr.},
  year = {1971},
  url = {https://ntrs.nasa.gov/citations/19710021288},
  note = {Source identifier: 19710021288}
}