Columbia subject headings:
Developing countries--Foreign economic relations--Spain.
Developing countries--Foreign economic relations--Yugoslavia.
Spain--Foreign economic relations--Developing countries.
Yugoslavia--Foreign economic relations--Developing countries.
Harvard subject headings:
Developing countries--Foreign economic relations--Spain.
Developing countries--Foreign economic relations--Yugoslavia.
Spain--Foreign economic relations--Developing countries.
Yugoslavia--Foreign economic relations--Developing countries.
Princeton subject headings: