@misc{indiciae15539f394c9a,
  title = {Thermionic reactor electric propulsion spacecraft for unmanned outer planet exploration},
  author = {Davis, J. P. and Mondt, J. F.},
  year = {1970},
  url = {https://ntrs.nasa.gov/citations/19700064408},
  note = {Source identifier: 19700064408}
}