@misc{indiciae6020683cef8c,
  title = {Electrostatically-focused extended-interaction S-band klystron amplifier.},
  author = {Boilard, D. I. and Lien, E. L. and Mizuhara, A.},
  year = {1966},
  url = {https://ntrs.nasa.gov/citations/19670043523},
  note = {Source identifier: 19670043523}
}