Columbia subject headings:
Harvard subject headings:
South Sudan--Politics and government--2011-
South Sudan--Relations--Sudan.
Sudan--History--2011-
Sudan--Politics and government--1985-
Sudan--Relations--South Sudan.
Princeton subject headings:
Civil war--South Sudan--History.
Civil war--Sudan--History.
South Sudan--History.
South Sudan--Relations--Sudan.
Sudan--History--2011-
Sudan--Relations--South Sudan.