@misc{indiciae02baf04b4a47,
  title = {Radiation cooled MPD arc thruster},
  author = {Checkley, R. J. and Esker, D. W. and Kroutil, J. C.},
  year = {1969},
  url = {https://ntrs.nasa.gov/citations/19690031674},
  note = {Source identifier: 19690031674}
}