@misc{indiciaec40d2ab68b61,
  title = {Flight simulators. Part 1: Present situation and trends. Part 2: Implications for training},
  author = {Hass, D. and Volk, W.},
  year = {1977},
  url = {https://ntrs.nasa.gov/citations/19780003176},
  note = {Source identifier: 19780003176}
}