Columbia subject headings:
Andes Region--Civilization.
Andes Region--Economic conditions.
Andes Region--Social conditions.
Harvard subject headings:
Andes Region--Civilization--Indian influences.
Andes Region--Civilization.
Andes Region--Economic conditions.
Andes Region--Social conditions.
Andres Region--Economic conditions.
Princeton subject headings:
Andes Region--Civilization.
Andes Region--Economic conditions.
Andes Region--Social conditions.