@misc{indiciae19fd81b65efc,
  title = {Optical system},
  author = {Breckinridge, J. B. and Page, N. A. and Shack, R. V. and Shannon, R. R.},
  year = {1985},
  url = {https://ntrs.nasa.gov/citations/19850015085},
  note = {Source identifier: 19850015085}
}