@misc{indiciaecfca594bb1d8,
  title = {Maximum propellant utilization in an electron-bombardment thruster.},
  author = {Kaufman, H. R. and Cohen, A. J.},
  year = {1971},
  url = {https://ntrs.nasa.gov/citations/19720030766},
  note = {Source identifier: 19720030766}
}