@misc{indiciae7a07ac94ad08,
  title = {Advanced ATC - An aircraft perspective},
  author = {Credeur, L. and Williams, D. H. and Howell, W. E. and Spitzer, C. R.},
  year = {1986},
  url = {https://ntrs.nasa.gov/citations/19860064899},
  note = {Source identifier: 19860064899}
}