Columbia subject headings:
American literature--19th century--Bibliography.
American literature--20th century--Bibliography.
United States--Civilization--Bibliography.
Harvard subject headings:
American literature--19th century--Bibliography
American literature--20th century--Bibliography
United States--Civilization--Bibliography.
Princeton subject headings:
American literature--19th century--Bibliography.
American literature--20th century--Bibliography.
United States--Civilization--Bibliography.