000 00279nam a2200121Ia 4500
008 211209s1957 xx 000 0 und d
041 _aeng
082 _a621.388 N57 FRA
100 _aFRASER A
245 _aTELECOMMUNICATIONS
260 _aLONDON
_bMACDONALD
_c1957
300 _a772
999 _c4448
_d4448