Columbia subject headings:
National characteristics, American.
National characteristics, Canadian.
National characteristics, Mexican.
North America--Civilization.
Harvard subject headings:
Canada--Social life and customs.
Mexico--Social life and customs.
Social values--Canada.
Social values--Mexico.
Social values--United States
United States--Social life and customs.
Princeton subject headings:
National characteristics, American.
National characteristics, Canadian.
National characteristics, Mexican.
North America--Civilization.