http://dewey.info/scheme/edition/e23/ en
331.88 Labor unions (Trade unions)
331.8809 History, geographic treatment, biography
331.88091 Areas, regions, places in general 331.88092 Labor leaders 331.880973 AFL-CIO
http://dewey.info/scheme/edition/e22/ de
331.88 Gewerkschaften
331.8809 Geschichte, geografische Behandlung, Biografien
331.88091 Behandlung nach Gebieten, Regionen, Orten im Allgemeinen 331.88092 Arbeiterführer, . . . 331.880973 AFL-CIO, . . .
Dewey Decimal Classification
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