@misc{indiciaea9b063b88602,
  title = {Achromatical Optical Correlator},
  author = {Chao, Tien-Hsin and Liu, Hua-Kuang},
  year = {1989},
  url = {https://ntrs.nasa.gov/citations/19890000357},
  note = {Source identifier: 19890000357}
}