Columbia subject headings:
Harvard subject headings:
Africa, Sub-Saharan--Relations--Arab countries.
Arab countries--Relations--Africa, Sub-Saharan.
Petroleum industry and trade--Political aspects--Africa, Sub-Saharan.
Petroleum industry and trade--Political aspects--Arab countries
Princeton subject headings:
Africa, Sub-Saharan--Relations--Arab countries.
Arab countries--Relations--Africa, Sub-Saharan.
Petroleum industry and trade--Political aspects--Africa, Sub-Saharan.
Petroleum industry and trade--Political aspects--Arab countries.