@misc{indiciae44e63b85f502,
  title = {A design study for a thermionic reactor power system for a nuclear electric propelled unmanned spacecraft Quarterly progress report, 5 May - 5 Aug. 1969},
  year = {1969},
  url = {https://ntrs.nasa.gov/citations/19700002872},
  note = {Source identifier: 19700002872}
}