Columbia subject headings:
MERCOSUR (Organization)--Influence--Congresses.
South America--Civilization--21st century--Congresses.
South America--Economic integration--Social aspects--Congresses.
Harvard subject headings:
MERCOSUR (Organization)--Influence--Congresses.
South America--Civilization--21st century--Congresses.
South America--Economic integration--Social aspects--Congresses.
Southern Cone of South America--Civilization--21st century--Congresses.
Princeton subject headings:
Southern Cone of South America--Civilization--21st century--Congresses.