Columbia subject headings:
Harvard subject headings:
Area studies--United States--History--19th century.
Area studies--United States--History--20th century.
Intellectuals--United States.
United States--Intellectual life.
Princeton subject headings:
Area studies--United States--History--19th century.
Area studies--United States--History--20th century.
Intellectuals--United States.
United States--Intellectual life.