000
00301nam a2200121Ia 4500
008
220201s1986 xx 000 0 eng d
041
_a
ENG
100
_a
GILL, P S
245
0
_a
BASIC TELECOMMUNICATION
260
_a
LONDON
_b
THAMES AND HUDSON PUBLISHING COMPANY
_c
1986
300
_a
485
942
_2
ddc
999
_c
55231
_d
55231