000 00309 a2200121 4500
082 _a384.9
_bG798h
245 1 _aHANDBOOK FOR RADIO OPERATORS WORKING INSTALLATIONS LICENSED
260 _aLondon
_bH. M. S. O.
_c1961
300 _a214
650 _aSignals And Signaling
964 _gCIRC
997 _a34815 C
999 _c454634
_d454634