Columbia subject headings:
Energy policy--Mauritania--21st century.
Mauritania--Economic conditions--21st century.
Mauritania--Politics and government--21st century.
Petroleum reserves--Mauritania.
Harvard subject headings:
Energy policy--Mauritania--21st century.
Mauritania--Economic conditions--21st century.
Mauritania--Politics and government--21st century.
Petroleum reserves--Mauritania.
Princeton subject headings: