@misc{indiciae511f9072118c,
  title = {Analysis of pilot warning indicator performance in terminal area traffic.},
  author = {Ruetenik, J. R. and Lange, W. R. and Thompson, J. H.},
  year = {1971},
  url = {https://ntrs.nasa.gov/citations/19720027468},
  note = {Source identifier: 19720027468}
}