Columbia subject headings:
Harvard subject headings:
Professional sports--Corrupt practices--Germany.
Professional sports--Economic aspects--Germany.
Referees--Germany.
Sports officiating--Corrupt practices--Germany.
Sports officiating--Economic aspects--Germany.
Sports officiating--Law and legislation--Germany.
Princeton subject headings:
Professional sports--Corrupt practices--Germany.
Professional sports--Economic aspects--Germany.
Referees--Germany.
Sports officiating--Corrupt practices--Germany.
Sports officiating--Economic aspects--Germany.
Sports officiating--Law and legislation--Germany.