000 00273nam a2200109Ia 4500
008 220201s1986 xx 000 0 eng d
100 _aRODDY (DENNIS) & COOLEN (JOHN)
245 0 _aELECTRONIC COMMUNICATIONS
250 _a3TH
260 _bPrintice hall
_c1986
942 _2ddc
999 _c94298
_d94298