@misc{indiciaecfc13f507161,
  title = {Human Factors Program for the Cooperative Pilot Warning Indicator System Final Report},
  author = {Casperson, R. C. and Vallerie, L. L.},
  year = {1968},
  url = {https://ntrs.nasa.gov/citations/19690014515},
  note = {Source identifier: 19690014515}
}