TY  - RPRT
TI  - Servo-amplifiers for ion current measurement in mass spectrometry
AU  - J. S. Stacey
AU  - R.D. Russell
AU  - F. Kollar
PY  - 2002
DO  - 10.1088/0950-7671/42/6/305
UR  - https://pubs.usgs.gov/publication/70010522
ID  - 70010522
ER  -