@misc{indiciae35bd136283d4,
  title = {A new method for generating depth contours holographically.},
  author = {Varner, J. R. and Zelenka, J. S.},
  year = {1968},
  url = {https://ntrs.nasa.gov/citations/19680063365},
  note = {Source identifier: 19680063365}
}