Columbia subject headings:
Gambling--Law and legislation--Austria.
Gambling--Law and legislation--European Union countries.
Internet gambling--Law and legislation--Austria.
Internet gambling--Law and legislation--European Union countries.
Harvard subject headings:
Gambling--Law and legislation--Austria.
Gambling--Law and legislation--European Union countries.
Internet gambling--Law and legislation--Austria.
Internet gambling--Law and legislation--European Union countries.
Princeton subject headings: