000 00301nam a2200121Ia 4500
008 220201s1986 xx 000 0 eng d
041 _aENG
100 _aGILL, P S
245 0 _aBASIC TELECOMMUNICATION
260 _aLONDON
_bTHAMES AND HUDSON PUBLISHING COMPANY
_c1986
300 _a485
942 _2ddc
999 _c55231
_d55231