TY  - BOOK
AU  - Gewartowski,J.W.
AU  - Watson,H.A.
TI  - Principles of electron tubes: including grid-controlled tubes, microwave tubes and gas tubes 
PY  - 1965///
CY  - Princeton, NJ
PB  - D. Van Nostrand
KW  - Electron tubes
KW  - Electronics
ER  -