Columbia subject headings:
Canada--Foreign relations--Treaties.
Canada--Foreign relations--United States.
United States--Foreign relations--Canada.
United States--Foreign relations--Treaties.
Harvard subject headings:
Canada--Foreign relations--Treaties.
Canada--Foreign relations--United States.
United States--Foreign relations--Canada.
United States--Foreign relations--Treaties.
Princeton subject headings:
Canada--Foreign relations--Treaties.
Canada--Foreign relations--United States.
Treaties.
United States--Foreign relations--Canada.
United States--Foreign relations--Treaties.