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100   $a20020821d1975----km-y0itay50------ba
101 0 $aeng
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200 1 $aPower transmission by direct current$fErich Uhlmann
210   $aBerlin ; Heidelberg$cSpringer-Verlag$d1975
215   $a389 p.$cill.$d24 cm
610 0 $aDistribuzione dell'energia elettrica$aCorrente continua
676   $a621.319'12
700  1$aUhlmann,$bErich
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