Columbia subject headings:
Borno State (Nigeria)--Economic conditions.
Borno State (Nigeria)--Politics and government.
Yobe State (Nigeria)--Economic conditions.
Yobe State (Nigeria)--Politics and government.
Harvard subject headings:
Borno State (Nigeria)--Economic conditions.
Borno State (Nigeria)--Politics and government.
Yobe State (Nigeria)--Economic conditions.
Yobe State (Nigeria)--Politics and government.
Princeton subject headings: