Columbia subject headings:
Gambling--Law and legislation--United States.
Gambling--Licenses--United States.
Internet gambling--Law and legislation--United States.
Harvard subject headings:
Gambling--Law and legislation--United States
Gambling--Licenses--United States.
Internet gambling--Law and legislation--United States.
Princeton subject headings:
Gambling--Law and legislation--United States.
Gambling--Licenses--United States.
Internet gambling--Law and legislation--United States.