000 00290nam a2200121Ia 4500
008 211209s1979 xx 000 0 und d
041 _aeng
082 _a621.382 N79 LLO
100 _aLLOYD T
245 _aTHEORY AND PROBLEMS OF ELECTRONIC COMMUNICATION
260 _c1979
300 _a138
999 _c15958
_d15958