@misc{indiciaea41738c0b30b,
  title = {Space Shuttle landing navigation using precision distance measuring equipment.},
  author = {Widnall, W. S. and Morth, H. R.},
  year = {1972},
  url = {https://ntrs.nasa.gov/citations/19720060971},
  note = {Source identifier: 19720060971}
}