@misc{indiciaebdcd17c31edf,
  title = {A preliminary systems study of interface equipment for digitally programmed flight simulators},
  author = {Du Lac, K. B. and Johnson, E. L.},
  year = {1969},
  url = {https://ntrs.nasa.gov/citations/19700008053},
  note = {Source identifier: 19700008053}
}