Columbia subject headings:
Puerto Rico--Politics and government--1898-1952--Congresses.
Statehood (American politics)--Congresses.
Harvard subject headings:
Puerto Rico--Politics and government--1898-1952--Congresses.
Statehood (American politics)--Congresses.
Princeton subject headings:
Constitutional law--Puerto Rico--Congresses.
Puerto Rico--Politics and government--1898-1952--Congresses.
Puerto Rico--Relations--United States--Congresses.
Statehood (American politics)--Congresses.