Columbia subject headings:
Government, Resistance to--Puerto Rico--History--20th century.
Nationalism--Puerto Rico.
Puerto Rico--History--1952-1998.
Puerto Rico--History--1998-
Harvard subject headings:
Government, Resistance to--Puerto Rico--History--20th century.
Nationalism--Puerto Rico
Puerto Rico--Politics and government--1952-1998.
Puerto Rico--Politics and government--1998-
Princeton subject headings:
Government, Resistance to--Puerto Rico--History--20th century.
Nationalism--Puerto Rico.
Puerto Rico--Politics and government--1952-1998.
Puerto Rico--Politics and government--1998-