Columbia subject headings:
Harvard subject headings:
Einheitsverband der Metallarbeiter Berlins.
Labor unions and communism--Germany--Berlin--History--20th century.
Metal-workers--Labor unions--Germany--Berlin--History--20th century.
Princeton subject headings:
Einheitsverband der Metallarbeiter Berlins--Biography.
Einheitsverband der Metallarbeiter Berlins--History--20th century.
Labor unions and fascism--Germany.
Metal-workers--Labor unions--Germany--Biography.
National socialism.