000 00228nam a2200073 4500
080 _a
_b
245 _aIEC: 663 - 1980; Planning of (Single-Sideband) Power Line Carrier Systems
700 _aInternational Electrotechnical Commission
260 _aGeneva
_bIEC
_c1980
300 _a89p
999 _c35939
_d35939