@misc{indiciaec8cb246281e7,
  title = {A Cassegrain echelle spectrograph},
  author = {Hunten, D. M. and Wells, W. K. and Brown, R. A. and Schneider, N. M. and Hilliard, R. L.},
  year = {1991},
  url = {https://ntrs.nasa.gov/citations/19920033357},
  note = {Source identifier: 19920033357}
}