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200 1 $aDiscontinuities in waveguides$enotes on lectures by Julian Schwinger$fJulian Schwinger and David S. Saxon
210   $aNew York$cGordon and Breach$d1968
215   $a163 p.$cill.$d23 cm
225 1 $aDocuments on modern physics
610 0 $aElettricitą
610 0 $aMagnetismo
610 0 $aCampi elettromagnetici
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700  1$aSchwinger,$bJulian$027151
701  1$aSaxon,$bDavid S.$027152
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