000 00314nam a2200121Ia 4500
999 _c22788
_d22788
008 190711s9999 xx 000 0 und d
082 _a621.385 J75
100 _aJolley, E, H.
245 0 _aIntroduction to Telephony and Telegraphy
260 _aBoston
_bA. H. Wheeler
_c1987
300 _a24X18 4113
942 _cBK