TY  - BOOK
AU  - Henney,Keith
TI  - Electron tubes in industry
AV  - QC544.V3 H4 1952
U1  - 537.53621.342* 
PY  - 1952///
CY  - New York
PB  - McGraw-Hill
KW  - Vacuum-tubes
N1  - Includes bibliography
ER  -