Columbia subject headings:
Harvard subject headings:
Latin America--Politics and government--20th century.
New Left--Latin America--History--20th century.
Political participation--Latin America--History--20th century.
Radicalism--Latin America--History--20th century.
Revolutions and socialism--Latin America--History--20th century.
Right and left (Political science).
Princeton subject headings:
Latin America--Politics and government--Congresses.
Socialism and Christianity--Catholic Church--Latin America--Congresses.
Socialism--Latin America--Congresses.