@misc{indiciaef4834924db6d,
  title = {Holographic optical elements: Fabrication and testing},
  author = {Zech, R. G. and Shareck, M. and Ralston, L. M.},
  year = {1974},
  url = {https://ntrs.nasa.gov/citations/19740021996},
  note = {Source identifier: 19740021996}
}