Columbia subject headings:
Africa, Eastern--Commercial treaties.
Africa, Eastern--Economic integration.
Africa, Southern--Commercial treaties.
Africa, Southern--Economic integration.
Customs unions.
Preferential Trade Area of Eastern and Southern African States.
Southern African Development Coordination Conference.
Tariff preferences--Africa, Eastern.
Tariff preferences--Africa, Southern.
Harvard subject headings:
Africa, Eastern--Economic integration.
Africa, Southern--Economic integration.
European Economic Community countries.
Preferential Trade Area of Eastern and Southern African States.
Southern African Development Coordination Conference.
Princeton subject headings: