Columbia subject headings:
United States--Civilization--20th century.
United States--Description and travel.
United States--Social life and customs--1945-1970.
United States--Social life and customs--1971-
Harvard subject headings:
United States--Civilization--20th century.
United States--Description and travel.
United States--Social life and customs--1945-1970.
United States--Social life and customs--1971-
Princeton subject headings:
United States--Civilization--20th century.
United States--Description and travel.
United States--Social life and customs--1945-1970.
United States--Social life and customs--1971-