Columbia subject headings:
Chad--Politics and government--1960-1990.
Chad--Politics and government--1990-
Chiefdoms--Chad--History--20th century.
Decentralization in government--Chad.
Harvard subject headings:
Chad--Politics and government--1960-1990
Chad--Politics and government--1990-
Chiefdoms--Chad--History--20th century.
Decentralization in government--Chad.
Princeton subject headings: