Columbia subject headings:
Catholic Church--Spain--History--20th century--Congresses.
Spain--Church history--20th century--Congresses.
Spain--History--Civil War, 1936-1939--Congresses.
Spain--History--Republic, 1931-1939--Congresses.
Harvard subject headings:
Catholic Church--Spain--History--20th century--Congresses.
Spain--Church history--20th century--Congresses.
Spain--History--Civil War, 1936-1939--Congresses.
Spain--History--Republic, 1931-1939--Congresses.
Princeton subject headings:
Social movements--Spain--History--20th century--Congresses.
Spain--History--Civil War, 1936-1939--Congresses.
Spain--History--Republic, 1931-1939--Congresses.
Spain--Politics and government--1931-1939--Congresses.