Columbia subject headings:
Spain--Colonies.
Spain--History--1868-1931.
Harvard subject headings:
Spain--Colonies.
Spain--History--1868-1931.
Princeton subject headings:
Cuba--Civilization--Congresses.
Cuba--Relations--Spain--Congresses.
Puerto Rico--Civilization--Congresses.
Puerto Rico--Relations--Spain--Congresses.
Spain--Relations--Cuba--Congresses.
Spain--Relations--Puerto Rico--Congresses.
Spanish-American War, 1898--Congresses.