@misc{indiciae42cc1ddcd7dc,
  title = {Flight simulator with spaced visuals},
  author = {Gilson, Richard D. and Thurston, Marlin O. and Olson, Karl W. and Ventola, Ronald W.},
  year = {1980},
  url = {https://ntrs.nasa.gov/citations/20080012276},
  note = {Source identifier: 20080012276}
}