@misc{indiciaef11b5de0a629,
  title = {PYROLYTIC GRAPHITE ROCKET THRUST CHAMBER INVESTIGATION PROJECT. MONTHLY LETTER},
  author = {Coulbert, C. D.},
  year = {1961},
  url = {https://ntrs.nasa.gov/citations/19620002121},
  note = {Source identifier: 19620002121}
}