Columbia subject headings:
Great Britain--Commercial policy--Early works to 1800.
Great Britain--Foreign relations--Spain--Early works to 1800.
Spain--Foreign relations--Great Britain--Early works to 1800.
Harvard subject headings:
Great Britain--Commercial policy.
Great Britain--Foreign relations--Spain.
Spain--Foreign relations--Great Britain
Princeton subject headings:
Great Britain--Commercial policy--Early works to 1800.
Great Britain--Foreign relations--Spain--Early works to 1800.
Spain--Foreign relations--Great Britain--Early works to 1800.