Columbia subject headings:
Animal welfare--Law and legislation--United States.
Exotic animals--Law and legislation--United States.
Game laws--United States.
Wildlife conservation--Law and legislation--United States.
Wildlife-related recreation--United States.
Harvard subject headings:
Exotic animals--Law and legislation--United States.
Wildlife conservation--Law and legislation--United States
Wildlife-related recreation--United States--Prevention.
Princeton subject headings:
Exotic animals--Law and legislation--United States.
Wildlife conservation--Law and legislation--United States.
Wildlife-related recreation--United States.