TY  - BOOK
AU  - Deketh, J.
TI  - Fundamentals of radio-valve technique 
U1  - 621.384132 21st ed.
PY  - 1949///
CY  - Netherlands
PB  - N.V. Philips Gloeilampenfabrieken Eindhoven
KW  - Electronic tubes
KW  - Steampipe-radio
ER  -