@misc{indiciaeb956a82e3654,
  title = {Hypersonic technology-approach to an expanded program},
  author = {Hearth, D. P. and Preyss, A. E.},
  year = {1976},
  url = {https://ntrs.nasa.gov/citations/19770031745},
  note = {Source identifier: 19770031745}
}