@misc{indiciaebf2e698ceca3,
  title = {Traffic control system and method},
  author = {Laughlin, C. R. and Hollenbaugh, R. C. and Allen, W. K.},
  year = {1974},
  url = {https://ntrs.nasa.gov/citations/19740000024},
  note = {Source identifier: 19740000024}
}