TY  - BOOK
AU  - HEYBOER, J P
AU  - ZIJLSTRA, P
TI  - TRANSMITTING VALVES
U1  - D65 
PY  - 1953///
CY  - Holland
PB  - Philips Technical Library
KW  -  TRANSMITTING VALVES
KW  - ELECTRONICS AND COMMUNICATION ENGINEERING
ER  -