Columbia subject headings:
Economic forecasting--South America.
Social prediction--South America.
South America--Civilization--20th century.
South America--Economic conditions--1980-
South America--Economic integration.
South America--Environmental policy.
South America--Relations.
South America--Social conditions--1980-
Sustainable development--South America.
Twenty-first century--Forecasts.
Harvard subject headings:
Economic forecasting--South America.
Social prediction--South America.
South America--Civilization--20th century.
South America--Economic conditions--1918-
South America--Forecasting.
South America--Social conditions--20th century.
Twenty-first century--Forecasts
Princeton subject headings:
South America--Economic conditions--1918-
South America--History--20th century.
South America--Politics and government--1980-
South America--Social conditions--20th century.