@misc{indiciae26b002c78e24,
  title = {A fine-guidance sensor for the third OAO.},
  author = {Arbenz, K. and Callahan, T. T. and Schlueter, P. J.},
  year = {1968},
  url = {https://ntrs.nasa.gov/citations/19680046034},
  note = {Source identifier: 19680046034}
}