@misc{indiciae0e03d7bb74d1,
  title = {Ophthalmic method and apparatus},
  author = {Evvard, J. C. and Mcgannon, W. J. and Vargo, D. J.},
  year = {1973},
  url = {https://ntrs.nasa.gov/citations/19730018335},
  note = {Source identifier: 19730018335}
}