@misc{indiciaed2cc7e284bea,
  title = {The Objective Double Crystal Spectrometer},
  author = {Walker, Arthur B. C., Jr. and Willis, Thomas D. and Hoover, Richard B.},
  year = {1992},
  url = {https://ntrs.nasa.gov/citations/19930055690},
  note = {Source identifier: 19930055690}
}