Columbia subject headings:
Popular culture--United States--History--20th century.
United States--Civilization--20th century.
United States--Politics and government--20th century.
Harvard subject headings:
Popular culture--United States--History--20th century
United States--Civilization--20th century.
United States--Politics and government--20th century.
Princeton subject headings:
Popular culture--United States--History--20th century.
United States--Civilization--20th century.
United States--Politics and government--20th century.