Columbia subject headings:
Puerto Rico--History--Autonomy and independence movements.
Puerto Rico--Politics and government--1898-1952.
Puerto Rico--Politics and government--1952-1998.
Self-determination, National--Puerto Rico.
Harvard subject headings:
Puerto Rico--History--Autonomy and independence movements.
Puerto Rico--Politics and government--1898-1952.
Puerto Rico--Politics and government--1952-
Puerto Rico--Politics and government--1952-1998.
Self-determination, National--Puerto Rico
Princeton subject headings:
Puerto Rico--History--Autonomy and independence movements.
Puerto Rico--Politics and government--1898-1952.
Puerto Rico--Politics and government--1952-1998.
Self-determination, National--Puerto Rico.