@misc{indiciae3dacd4d979d6,
  title = {Hypersonic technology problems identified in mission studies},
  author = {Drake, H. M. and Gregory, T. J. and Petersen, R. H.},
  year = {1967},
  url = {https://ntrs.nasa.gov/citations/19740075111},
  note = {Source identifier: 19740075111}
}