Columbia subject headings:
Harvard subject headings:
Germany--Foreign relations--Spain.
Germany--History--1815-1866.
Germany--Relations--Spain.
Spain--Foreign relations--Germany.
Spain--History--Revolution, 1820-1823--Press coverage--Germany.
Spain--History--Revolution, 1820-1823.
Spain--Relations--Germany.
Princeton subject headings:
Germany--Foreign relations--Spain.
Spain--Foreign relations--1814-1886.
Spain--Foreign relations--Germany.
Spain--History--19th century.