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101 0 $aeng
105   $aa-------001yy
200 1 $aProtective relays$etheir theory and practice$fA.R. van C. Warrington
210   $aLondon$cChapman & Hall$d1962
215   $a2 v.$cill.$d23 cm
300   $a1. volume
610 0 $aRelè elettrici protettivi
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700  1$aWarrington,$bAlbert Russell van Cortlandt
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