000
002910000a22001330004500
245
_a
Radio and line transmission
100
_a
Green, D.C.
260
_a
London
_b
Pitman
300
_a
2 v.
500
_a
1971-1975 (318 p.; 291 p.)
080
_a
621.396
_b
G7
041
_a
EN
942
_c
BK
999
_c
94882
_d
94882