Columbia subject headings:
Endangered species--United States--History.
Wildlife conservation--Government policy--United States.
Wildlife management--Government policy--United States.
Harvard subject headings:
Endangered species--United States--History.
United States. Federal Aid in Wildlife Restoration Act--History.
United States. Federal Aid in Wildlife Restoration Act.
Wildlife conservation--Government policy--United States.
Wildlife conservation--United States
Wildlife management--Government policy--United States.
Princeton subject headings:
Endangered species--United States--History.
Wildlife conservation--Government policy--United States.
Wildlife conservation--Law and legislation--United States--History.
Wildlife management--Government policy--United States.