@misc{indiciae2e6bba90d184,
  title = {FORTRAN optical lens design program},
  author = {Firnett, P. J. and Schmidt, L. F. and Wilson, L. A.},
  year = {1968},
  url = {https://ntrs.nasa.gov/citations/19680000354},
  note = {Source identifier: 19680000354}
}