@misc{indiciae6d423d711acf,
  title = {Flow visualization of vortex interactions in multiple vortex wakes behind aircraft},
  author = {Ciffone, D. L. and Lonzo, C., Jr.},
  year = {1975},
  url = {https://ntrs.nasa.gov/citations/19760003942},
  note = {Source identifier: 19760003942}
}