@misc{indiciaeba2b92b8268c,
  title = {Ablative heat shields for planetary entry vehicles.},
  author = {Sparhawk, H. E. and Strauss, E. L.},
  year = {1968},
  url = {https://ntrs.nasa.gov/citations/19690033761},
  note = {Source identifier: 19690033761}
}