@misc{indiciaed2f8b5b62094,
  title = {Optical network synthesis using birefringent crystals. VI.},
  author = {Ammann, E. O. and Yarborough, J. M.},
  year = {1967},
  url = {https://ntrs.nasa.gov/citations/19670045689},
  note = {Source identifier: 19670045689}
}