@misc{indiciae773df7114eb8,
  title = {Visual aspects of air collision avoidance: Computer studies on pilot warning indicator specifications},
  author = {Edwards, G. D. and Harris, J. L., Sr.},
  year = {1972},
  url = {https://ntrs.nasa.gov/citations/19720017022},
  note = {Source identifier: 19720017022}
}