Columbia subject headings:
Africa, Eastern--Commerce.
Africa, Southern--Commerce.
International clearing--Africa, Eastern.
International clearing--Africa, Southern.
Harvard subject headings:
Africa, Eastern--Commerce.
Africa, Southern--Commerce.
International clearing--Africa, Eastern.
International clearing--Africa, Southern.
Princeton subject headings:
Africa, Sub-Saharan--Commerce.
Balance of payments--Africa, Sub-Saharan.
International economic integration.