@misc{1188081,
  author = {W F Mullis and I Nimeroff and E L Walters},
  title = {Focusing the Fresnel Lens Optical Landing System:},
  year = {1975},
  month = {1975-01-01 05:01:00},
  publisher = {, National Institute of Standards and Technology, Gaithersburg, MD},
  doi = {https://doi.org/10.6028/NBS.IR.75-644},
  language = {en},
}