000 00277nam a2200121Ia 4500
008 160710s1975 xx 000 0 und d
100 _aBRUCE, C. A.
245 _aCOMMUNICATION SYSTEMS
250 _aII
260 _bMGH INTERNATIONAL
_c1975
300 _a495
942 _2ddc
_cB
999 _c44521
_d44521