@misc{indiciae554dfbcf90b9,
  title = {Space Shuttle Orbiter improved auxiliary power unit},
  author = {Hagemann, D. W. and Wicklund, L. L. and Loken, G. R. and Baughman, J. R. and Lance, R. J.},
  year = {1984},
  url = {https://ntrs.nasa.gov/citations/19840021896},
  note = {Source identifier: 19840021896}
}