@misc{indiciae4fd5f6209138,
  title = {Dual-Cathode Electron-Beam Source},
  author = {Bradley, James G. and Conley, Joseph M. and Wittry, David B.},
  year = {1988},
  url = {https://ntrs.nasa.gov/citations/19880000321},
  note = {Source identifier: 19880000321}
}