Columbia subject headings:
Colombia--Boundaries--Venezuela.
Colombia--Foreign economic relations--Venezuela.
Venezuela--Boundaries--Colombia.
Venezuela--Foreign economic relations--Colombia.
Harvard subject headings:
Colombia--Boundaries--Venezuela.
Colombia--Foreign economic relations--Venezuela.
Venezuela--Boundaries--Colombia.
Venezuela--Foreign economic relations--Colombia.
Princeton subject headings:
Colombia--Foreign relations--Venezuela.
Venezuela--Foreign relations--Colombia.