Columbia subject headings:
Harvard subject headings:
Football fans--Germany--History.
Football--Germany--History.
Germany--Ethnic relations.
Right-wing extremists--Germany--History.
Soccer fans--Germany--History.
Soccer--Germany--History.
Violence in sports--Germany--History.
Princeton subject headings:
Germany--Ethnic relations.
Nationalism and sports--Germany.
Racism in sports--Germany.
Soccer--Political aspects--Germany.