Columbia subject headings:
Constitutional history--Puerto Rico.
Puerto Rico--Politics and government--1952-1998.
Puerto Rico--Relations--United States.
Harvard subject headings:
Constitutional history--Puerto Rico
Puerto Rico--Politics and government--1952-1998.
Puerto Rico--Relations--United States.
Princeton subject headings:
Constitutional history--Puerto Rico.
Constitutions--Puerto Rico.
Puerto Rico--Politics and government.
State, The.