1. Adam, H. (1971). “Some unsolved problems in modern vacuum technology.” Lecture given at the 2nd Israel Vacuum Congress (unpublished).
2. AVS 6.4 (1969). Procedure for Calibrating Hot Filament Ionization Gauges Against a Reference Manometer in the Range 10−2–10−5 Torr.
3. Arney, G. D., and Henderson, W. F. (1967). AEDC-Tr-67−83.