Columbia subject headings:
Great Britain--Foreign relations--Spain.
Neutrality.
Spain--Foreign relations--1931-1939.
Spain--Foreign relations--Great Britain.
Spain--Foreign relations--United States.
Spain--History--Civil War, 1936-1939--Causes.
United States--Foreign relations--Spain.
Harvard subject headings:
Great Britain--Foreign relations--Spain.
Neutrality.
Spain--Foreign relations--1931-1939.
Spain--Foreign relations--Great Britain
Spain--Foreign relations--United States.
Spain--History--Civil War, 1936-1939--Causes.
United States--Foreign relations--Spain.
Princeton subject headings:
Great Britain--Foreign relations--Spain.
Neutrality.
Spain--Foreign relations--1931-1939.
Spain--Foreign relations--Great Britain.
Spain--Foreign relations--United States.
Spain--History--Civil War, 1936-1939--Causes.
United States--Foreign relations--Spain.