Columbia subject headings:
Commodification--Germany--Berlin--History--19th century.
Commodification--New York (State)--New York--History--19th century.
Hours of labor--Germany--Berlin--History--19th century.
Hours of labor--New York (State)--New York--History--19th century.
Labor movement--Germany--Berlin--History--19th century.
Labor movement--New York (State)--New York--History--19th century.
Labor unions--Germany--Berlin--History--19th century.
Labor unions--New York (State)--New York--History--19th century.
Working class--Germany--Berlin--Social conditions--19th century.
Working class--New York (State)--New York--Social conditions--19th century.
Harvard subject headings:
Commodification--Germany--Berlin--History--19th century.
Commodification--New York (State)--New York--History--19th century.
Hours of labor--Germany--Berlin--History--19th century.
Hours of labor--New York (State)--New York--History--19th century.
Labor movement--Germany--Berlin--History--19th century.
Labor movement--New York (State)--New York--History--19th century.
Labor unions--Germany--Berlin--History--19th century.
Labor unions--New York (State)--New York--History--19th century.
Working class--Germany--Berlin--Social conditions--19th century.
Working class--New York (State)--New York--Social conditions--19th century.
Princeton subject headings:
Commodification--Germany--Berlin--History--19th century.
Commodification--New York (State)--New York--History--19th century.
Hours of labor--Germany--Berlin--History--19th century.
Hours of labor--New York (State)--New York--History--19th century.
Labor movement--Germany--Berlin--History--19th century.
Labor movement--New York (State)--New York--History--19th century.
Labor unions--Germany--Berlin--History--19th century.
Labor unions--New York (State)--New York--History--19th century.
Working class--Germany--Berlin--Social conditions--19th century.
Working class--New York (State)--New York--Social conditions--19th century.