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200 1 $aLow-frequency amplification$ea treatise on the technical and scientific principles and the modern practical use of L.F. amplification$fby N. A. J. Voorhoeve
210   $aHolland$cPhilips' Technical library$d1953
215   $a495 p.$cill.$d23 cm
610 0 $aAmplificatori
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700  1$aVoorhoeve,$bN. A. J.$0491781
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