@misc{indiciae234f57b8e62d,
  title = {Far-Infrared Heterodyne Spectrometer for SOFIA},
  author = {Betz, A. L. and Boreiko, R. T.},
  year = {1998},
  url = {https://ntrs.nasa.gov/citations/19990051023},
  note = {Source identifier: 19990051023}
}