@misc{indiciae43411fafe7ff,
  title = {Inexpensive, high vacuum, high voltage, electric feedthrough.},
  author = {Dougal, A. A. and Kristiansen, M. and Melton, J. G.},
  year = {1967},
  url = {https://ntrs.nasa.gov/citations/19670061619},
  note = {Source identifier: 19670061619}
}