000 00343nam a2200133Ia 4500
008 220201s1970 xx 000 0 eng d
041 _aENG
100 _aFRASIER, GEORGE WILLARD
245 0 _aTELECOMMUNICATIONS (S.I. UNITS)
250 _a2ND
260 _aLONDON
_bTHAMES AND HUDSON PUBLISHING COMPANY
_c1970
300 _a830
942 _2ddc
999 _c46410
_d46410