Columbia subject headings:
Conservation of natural resources--United States--History.
Frontier and pioneer life--United States.
Indians of North America.
Nature conservation--United States--History.
Harvard subject headings:
Conservation of natural resources--United States--History.
Ethnology--United States--History.
Frontier and pioneer life--United States
Indians of North America--Public opinion.
Nature conservation--United States--History
Princeton subject headings:
Conservation of natural resources--United States--History.
Frontier and pioneer life--United States--History.
Nature conservation--United States--History.