TY  - BOOK
AU  - Koller, L.R
TI  - The physics of electron tubes
U1  - PE110 
PY  - 1937///
CY  - London
PB  - Mcgraw-hill book company
N1  - PE mean Physics, Electricity and Magnetism Page 450-456 in A to Z Register (Acc. No. Pe1-Pe205)
ER  -