Columbia subject headings:
Horse racing--Betting--Law and legislation--United States--Legal research.
Horse racing--Law and legislation--United States--Legal research.
Harvard subject headings:
Horse racing--Betting--Law and legislation--United States--Legal research.
Horse racing--Law and legislation--United States--Legal research.
Racetracks (Horse racing)--Law and legislation--United States--Legal research.
Simulcasting of horse racing--United States--Legal research.
Princeton subject headings: