@misc{indiciaef9c643d268b9,
  title = {Perspective traffic display format and airline pilot traffic avoidance},
  author = {Ellis, Stephen R. and Mcgreevy, Michael W. and Hitchcock, Robert J.},
  year = {1987},
  url = {https://ntrs.nasa.gov/citations/19880025412},
  note = {Source identifier: 19880025412}
}