@misc{indiciae3990de160257,
  title = {A 1:1 apochromat transfer lens system},
  author = {Tifft, W. G. and Buchroeder, R. A.},
  year = {1971},
  url = {https://ntrs.nasa.gov/citations/19720011032},
  note = {Source identifier: 19720011032}
}