000 002910000a22001330004500
245 _aRadio and line transmission
100 _aGreen, D.C.
260 _aLondon
_bPitman
300 _a2 v.
500 _a1971-1975 (318 p.; 291 p.)
080 _a621.396
_bG7
041 _aEN
942 _cBK
999 _c94882
_d94882