000 00334nam a2200121Ia 4500
008 240531s9999 xx 000 0 und d
020 _a978 0 8160 2029 4
082 _a384 03 GRA
100 _aGraham,John.
245 4 _aThe facts On File Dictionary of Telecommunications.
942 _cBK
999 _c324851
_d324851