@misc{indiciae9d6599b849b8,
  title = {Spectrograph Measures Contamination Of Optical Elements},
  author = {Flint, Bruce K. and Fancy, Robert D. and Jarratt, Robert V., Jr.},
  year = {1989},
  url = {https://ntrs.nasa.gov/citations/19890000122},
  note = {Source identifier: 19890000122}
}