@misc{indiciaed0b42cfe42c0,
  title = {Langley proposed advanced hypervelocity aerophysics facility - A status report},
  author = {Witcofski, Robert D. and Scallion, William I.},
  year = {1989},
  url = {https://ntrs.nasa.gov/citations/19930063018},
  note = {Source identifier: 19930063018}
}