@misc{indiciae9db5b968898c,
  title = {Servo-amplifiers for ion current measurement in mass spectrometry},
  author = {J. S. Stacey and R.D. Russell and F. Kollar},
  year = {2002},
  doi = {10.1088/0950-7671/42/6/305},
  url = {https://pubs.usgs.gov/publication/70010522},
  note = {Source identifier: 70010522}
}