Columbia subject headings:
Clayton-Bulwer Treaty
Great Britain--Foreign relations--United States.
United States--Foreign relations--Great Britain.
United States--Foreign relations--Treaties.
Harvard subject headings:
Great Britain--Foreign relations--United States.
Great Britain. Treaties, etc. (1850 Apr. 19)
Great Britain. Treaties, etc. 1850 April 19.
United States--Foreign relations--Great Britain.
United States--Foreign relations--Treaties.
Princeton subject headings:
Great Britain--Foreign relations--United States.
Great Britain. Treaties, etc. 1850 Apr. 19.
Treaties.
United States--Foreign relations--Great Britain.
United States--Foreign relations--Treaties.