00478nam a22001217a 4500020002400000082001800024100001700042245008600059260004800145300003200193500002000225650011100245  a9781107629561 (pbk)  a621.3842bTUR  aTurner L. B.  aWireless telegraphy and telephonyban outline for electrical engineers and others  aNew YorkbCambridge University Press c2013  ax, 195 p.b: ill.c; 23 cm.  aIncludes index.  aTelegraph WirelessaRadiotelephonevThermionic valve circuitsvRadiovTelegraphvAmplifier vTriodesvFEAS