@misc{indiciaeaaf5293c4b1a,
  title = {Engine throat/nozzle optics for plume spectroscopy},
  author = {Bickford, R. L. and Duncan, D. B.},
  year = {1991},
  url = {https://ntrs.nasa.gov/citations/19910013060},
  note = {Source identifier: 19910013060}
}