@misc{indiciaebbfcbe7fddbd,
  title = {A photon-counting multichannel spectrometer},
  author = {Shectman, S. A. and Hiltner, W. A.},
  year = {1977},
  url = {https://ntrs.nasa.gov/citations/19770039509},
  note = {Source identifier: 19770039509}
}