@misc{indiciae21e3ccaa8175,
  title = {Supersonic wake flow visualization},
  author = {Hall, C. R., Jr. and Mueller, T. J. and Sule, W. P.},
  year = {1969},
  url = {https://ntrs.nasa.gov/citations/19700039479},
  note = {Source identifier: 19700039479}
}