331.88 Labor unions (Trade unions)
331.881 Labor unions by industry and occupation
331.8811 Labor unions in industries and occupations other than extractive, manufacturing, construction de
331.88 Gewerkschaften
331.881 Gewerkschaften nach Industrie und Beruf
331.8811 Gewerkschaften in anderen Industrien als den, anderen Berufen als in den Grundstoffindustrien, dem verarbeitenden Gewerbe, der Bauwirtschaft
Dewey Decimal Classification
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