940.31 Sozialgeschichte, politische Geschichte, Wirtschaftsgeschichte
940.311 Kriegsursachen—Erster Weltkrieg
940.3112 Diplomatische Kriegsursachen—Erster Weltkrieg, . . . 940.3113 Wirtschaftliche Kriegsursachen—Erster Weltkrieg 940.3114 Psychologische Kriegsursachen—Erster Weltkrieg, . . .
Dewey Decimal Classification
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