331.88 Labor unions (Trade unions)
331.88092 Labor leaders, . . . vi
331.88 Công đoàn (Nghiệp đoàn)
331.88092 Nhà lãnh đạo công đoàn, . . . it
331.88 Sindacati
331.88092 Dirigenti sindacali, . . . en
331.8809 History, geographic treatment, biography
331.88092 Labor leaders de
331.8809 Geschichte, geografische Behandlung, Biografien
331.88092 Arbeiterführer, . . .
Dewey Decimal Classification
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