TY  - BOOK
AU  - Appleton [e V], 
TI  - Thermonic Vacum Tubes
U1  - 537.53 
PY  - 1946///
CY  - Kozhikode
PB  - Mathrubhumi
KW  - General Stack
KW  - Physics
KW  - ScienceVacuum-tubes
KW  - Electronics
ER  -