@misc{indiciae79d69294a20e,
  title = {Optical inertial space sextant for an advanced space navigation system},
  author = {Derby, R. M. and Foley, W. D. and Gates, W. D. and Wilczynski, J. J.},
  year = {1964},
  url = {https://ntrs.nasa.gov/citations/19650002700},
  note = {Source identifier: 19650002700}
}