Columbia subject headings:
United States--Civilization--20th century.
United States--Foreign public opinion.
Visitors, Foreign--United States.
Harvard subject headings:
Africans--United States
United States--Civilization--20th century.
United States--Foreign public opinion.
Visitors, Foreign--United States.
Princeton subject headings:
Africans--United States.
United States--Civilization--20th century.
United States--Foreign public opinion.
Visitors, Foreign--United States.