@misc{indiciaeb9ad2f7476aa,
  title = {Electron bombardment improves vacuum chamber efficiency},
  author = {Przybyszewski, J. and Swiker, M. A. and Watson, J.},
  year = {1965},
  url = {https://ntrs.nasa.gov/citations/19650000278},
  note = {Source identifier: 19650000278}
}