Columbia subject headings:
Soviet Union--Description and travel.
Soviet Union--Social life and customs.
United States--Description and travel.
United States--Social life and customs.
Harvard subject headings:
Soviet Union--Description and travel.
Soviet Union--Social life and customs.
United States--Description and travel.
United States--Social life and customs.
Princeton subject headings:
Soviet Union--Description and travel.
Soviet Union--Social life and customs.
United States--Description and travel.
United States--Social life and customs.