Columbia subject headings:
Endangered species--Law and legislation--United States.
Wildlife conservation--Law and legislation--United States.
Wildlife conservationists--United States.
Wildlife reintroduction--United States.
Harvard subject headings:
Endangered species--Law and legislation--United States
Wildlife conservation--Law and legislation--United States
Wildlife conservationists--United States.
Wildlife reintroduction--United States.
Princeton subject headings:
Endangered species--Law and legislation--United States.
Wildlife conservation--Law and legislation--United States.
Wildlife reintroduction--United States.