Columbia subject headings:
Labor movement--Europe, Eatern.
Labor movement--Europe.
Labor unions--Europe, Eastern.
Labor unions--Europe.
Harvard subject headings:
Civil rights--Europe
Civil rights--Europe, Eastern
Labor and laboring classes--Europe, Eastern.
Labor and laboring classes--Europe.
Labor unions--Europe
Labor unions--Europe, Eastern.
Labor unions--Law and legislation--Europe, Eastern.
Labor unions--Law and legislation--Europe.
Working class--Europe, Eastern
Working class--Europe.
Princeton subject headings:
Labor movement--Europe.
Labor unions--Europe, Eastern.
Labor unions--Europe.