连续介质电动力学
TWENTY-FIVEyearshavepassedsincethewritingofthisvolumeinitsfirstedition.Suchalongintervalhasinevitablymadenecessaryafairlythoroughrevisionandexpansionofthebookforitssecondedition.
Theoriginalchoiceofmaterialwassuchthat,withsomeveryslightexceptions,ithasnotbecomeobsolete.Inthispart,onlysomerelativelyminoradditionsandimprovementshavebeenmade.
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