Columbia subject headings:
Finance--Puerto Rico.
Puerto Rico--Economic conditions.
Puerto Rico--Politics and government--1898-1952.
Puerto Rico--Social conditions.
Harvard subject headings:
Finance--Puerto Rico.
Puerto Rico--Economic conditions
Puerto Rico--Politics and government--1898-1952.
Puerto Rico--Social conditions.
Princeton subject headings:
Finance--Puerto Rico.
Puerto Rico--Economic conditions.
Puerto Rico--Politics and government--1898-1952.
Puerto Rico--Social conditions.