Columbia subject headings:
Election monitoring--South America--Case studies.
Intervention (International law)--Political aspects.
South America--Politics and government.
Sovereignty.
Harvard subject headings:
Latin America--Social policy.
League of Nations--History.
Nation-state--History--20th century.
Peace-building--Latin America--History--20th century.
Poor--Civil rights--Latin America.
Public welfare--Latin America--History--20th century.
Princeton subject headings:
Case studies.
Election monitoring--South America--Case studies.
Intervention (International law)--Political aspects.
Latin America--Politics and government.
South America--Politics and government.
Sovereignty.