TY  - BOOK
AU  - Preisman,Albert
TI  - Graphical construction for vacuum tube circuits,
U1  - 621.384132 
PY  - 1943///
CY  - New York, London
PB  - McGraw-Hill Book Company, inc.
KW  - TUBOS AL VACÍO
KW  - CIRCUITOS ELÉCTRICOS
ER  -