TY  - BOOK
AU  - Eastman, Austin Vitruvius,
TI  - Fundamentals of vacuum tubes
T2  - Mcgraw-hill electrical and electronic engineering series
AV  - QC544.V3 E3 1949
PY  - 1949///
CY  - New York
PB  - McGraw-Hill
KW  - Tubos de vacío
ER  -