TY  - BOOK
AU  - Underhill,Charles Reginald
TI  - Electrons at work: a simple and general treatise on electronic devices, their circuits, and industrial uses,
PY  - 1933///
CY  - New York, London
PB  - McGraw-Hill book company, inc.
KW  - APARATOS ELÉCTRICOS Y SUS APLICACIONES
KW  - ELECTRONES
ER  -