Columbia subject headings:
Africa, Sub-Saharan--Economic conditions--1960-
Africa, Sub-Saharan--Foreign economic relations--United States.
Petroleum industry and trade--Africa, Sub-Saharan.
United States--Foreign economic relations--Africa, Sub-Saharan.
United States. African Growth and Opportunity Act--Evaluation.
Harvard subject headings:
Africa, Sub-Saharan--Economic conditions--1960-
Africa, Sub-Saharan--Foreign economic relations--United States.
Petroleum industry and trade--Africa, Sub-Saharan.
United States--Foreign economic relations--Africa, Sub-Saharan.
United States. African Growth and Opportunity Act--Evaluation.
Princeton subject headings:
Africa, Sub-Saharan--Economic conditions--1960-
Africa, Sub-Saharan--Foreign economic relations--United States.
Petroleum industry and trade--Africa, Sub-Saharan.
United States--Foreign economic relations--Africa, Sub-Saharan.
United States. African Growth and Opportunity Act--Evaluation.