http://dewey.info/scheme/edition/e23/ en
940.3 World War I, 1914-1918
940.32 Diplomatic history
940.322 Allies and associated powers 940.324 Central Powers 940.325 Neutrals
http://dewey.info/scheme/edition/e22/ de
940.3 Erster Weltkrieg, 1914–1918
940.32 Diplomatiegeschichte
940.322 Alliierte und den Alliierten zugeordnete Mächte 940.324 Mittelmächte 940.325 Neutrale Länder
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