Columbia subject headings:
Culture diffusion--Europe--History--20th century.
Culture diffusion--United States--History--20th century.
Europe--Civilization--20th century.
Europe--Civilization--American influences.
United States--Civilization--20th century.
United States--Civilization--European influences.
Harvard subject headings:
Culture diffusion--Europe--History--20th century.
Culture diffusion--United States--History--20th century.
Europe--Civilization--20th century
Europe--Civilization--American influences
United States--Civilization--20th century
United States--Civilization--European influences
Princeton subject headings:
Culture diffusion--Europe--History--20th century.
Culture diffusion--United States--History--20th century.
Europe--Civilization--20th century.
Europe--Civilization--American influences.
United States--Civilization--20th century.
United States--Civilization--European influences.