Columbia subject headings:
American literature--19th century--History and criticism.
West (U.S.)--In literature.
Harvard subject headings:
American literature--19th century--History and criticism
Frontier and pioneer life in literature.
West (U.S.)--In literature.
Princeton subject headings:
American literature--19th century--History and criticism.
Frontier and pioneer life in literature.
West (U.S.)--In literature.