http://dewey.info/scheme/edition/e23/ en
940.311 Causes of war--World War I
940.3112 Diplomatic causes of war--World War I
http://dewey.info/scheme/edition/e22/ de
940.311 Kriegsursachen—Erster Weltkrieg
940.3112 Diplomatische Kriegsursachen—Erster Weltkrieg, . . .
Dewey Decimal Classification
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