000 00274nam a2200121Ia 4500
008 200701s1986 xx 000 0 eng d
100 _aA BRUCE KARLSON
245 0 _aCOMMUNICATION SYSTEMS
250 _a3rd
260 _bMCGRAW HILL
_c1986
300 _a686
942 _2ddc
_cGE
999 _c1684
_d1684