@misc{indiciaeb888abf39ae7,
  title = {FORTRAN optical lens design program. Volume 3 - Program organization and description},
  author = {Firnett, P. J. and Wilson, L. A.},
  year = {1968},
  url = {https://ntrs.nasa.gov/citations/19690005537},
  note = {Source identifier: 19690005537}
}