Columbia subject headings:
Harvard subject headings:
Movimiento Pro Independencia de Puerto Rico
Partido Socialista Puertorriqueño
Puerto Rico--History--Autonomy and independence movements
Puerto Rico--Politics and government--1952-1998
Princeton subject headings:
Movimiento Pro Independencia de Puerto Rico.
Partido Socialista Puertorriqueño.
Puerto Rico--History--20th century.
Puerto Rico--History--Autonomy and independence movements.
Puerto Rico--Politics and government--1952-1998.