Columbia subject headings:
Frontier and pioneer life--United States--Dictionaries.
Indians of North America--History--Encyclopedias.
United States--History--Dictionaries.
Harvard subject headings:
Frontier and pioneer life--United States--Dictionaries.
Indians of North America--History--Dictionaries.
United States--History--Dictionaries.
Princeton subject headings:
Dictionaries.
Frontier and pioneer life--United States--Dictionaries.
Indians of North America--History--Dictionaries.
United States--History--Dictionaries.