TY  - BOOK
AU  - Aldous,W.H., Appleton, Edwar
AU  - x
TI  - Thermionic vacuum tubes and their applifcations: x
SN  - x
U1  - 537.533/ALT 
PY  - 1961///
CY  - Lond
PB  - Methuen
KW  - Vacuum Tuber
N1  - x
ER  -