Columbia subject headings:
Liberia--Foreign economic relations--Sierra Leone.
Liberia--Foreign relations--Sierra Leone.
Sierra Leone--Foreign economic relations--Liberia.
Sierra Leone--Foreign relations--Liberia.
Harvard subject headings:
Liberia--Foreign economic relations--Sierra Leone.
Liberia--Foreign relations--Sierra Leone.
Sierra Leone--Foreign economic relations--Liberia.
Sierra Leone--Foreign relations--Liberia.
Princeton subject headings: