@misc{indiciae2d656a9c8148,
  title = {Ion and diffusion pump high vacuum systems},
  author = {Moore, W. W., Jr. and Prince, W. L. and Tashbar, P. W. and Williams, J. R.},
  year = {1969},
  url = {https://ntrs.nasa.gov/citations/19700026647},
  note = {Source identifier: 19700026647}
}