@misc{indiciae409fae2bd109,
  title = {LM cathode electron-bombardment thrusters.},
  author = {Arnold, K. W. and Eckhardt, W. O. and Hagen, G. and Hyman, J., Jr. and Knechtli, R. C. and Snyder, J.},
  year = {1967},
  url = {https://ntrs.nasa.gov/citations/19670059972},
  note = {Source identifier: 19670059972}
}