Transmitting valves : the use of pentodes, tetrodes and triodes in transmitter circuits /
Heyboer, J.P.
Transmitting valves : the use of pentodes, tetrodes and triodes in transmitter circuits / J.P. Heyboer - Holland : Philips' Technical Library, 1951 - 284 p.;, 23,5 cm.
621.385