Columbia subject headings:
Harvard subject headings:
Arbeiter- Turn- und Sportbund--History--20th century.
Arbeiter-Turn- und Sportbund--History.
Soccer teams--Germany--History--20th century.
Soccer--Germany--History--20th century.
Working class--Germany--History--20th century
Working class--Recreation--Germany--History--20th century.
Princeton subject headings:
Arbeiter-Turn- und Sportbund--History.
Soccer teams--Germany--History--20th century.
Soccer--Germany--History--20th century.
Working class--Germany--History--20th century.