@misc{indiciaebecdb4321983,
  title = {Backup Alignment Devices on Shuttle: Heads-Up Display or Crew Optical Alignment Sight},
  author = {Chavez, Melissa A.},
  year = {2011},
  url = {https://ntrs.nasa.gov/citations/20110003648},
  note = {Source identifier: 20110003648}
}