Columbia subject headings:
Great Britain--Foreign relations--Spain.
Spain--Foreign relations--Great Britain.
Thirty Years' War, 1618-1648--Diplomatic history.
Harvard subject headings:
Great Britain--Foreign relations--1603-1688.
Great Britain--Foreign relations--Spain.
Spain--Foreign relations--1621-1665.
Spain--Foreign relations--Great Britain
Thirty Years' War, 1618-1648--Diplomatic history.
Princeton subject headings:
Great Britain--Foreign relations--Spain.
Spain--Foreign relations--Great Britain.
Thirty Years' War, 1618-1648--Diplomatic history.