Columbia subject headings:
South Sudan--History--21st century.
Sudan--History--Civil War, 1983-2005.
Sudan--History--Darfur Conflict, 2003-
Sudan--Politics and government--20th century.
Sudan--Politics and government--21st century.
Harvard subject headings:
Sudan--Economic conditions.
Sudan--History
Sudan--Politics and government--1956-1985
Sudan--Politics and government--1985-
Sudan--Social conditions.
Princeton subject headings:
Sudan--Economic conditions.
Sudan--History.
Sudan--Politics and government--1956-1985.
Sudan--Politics and government--1985-
Sudan--Social conditions.