@misc{indiciae47b8313e0250,
  title = {Nuclear thermal rockets - Next step to space},
  author = {Borowski, Stanley K. and Gabris, Edward A. and Martinell, John},
  year = {1989},
  url = {https://ntrs.nasa.gov/citations/19890053109},
  note = {Source identifier: 19890053109}
}