Columbia subject headings:
South Sudan--Foreign relations--Sudan.
South Sudan--History--21st century.
South Sudan--Politics and government--2011-
Sudan--Foreign relations--South Sudan.
Sudan--History--1956-
Sudan--History--2011-
Sudan--Politics and government--1985-
Harvard subject headings:
South Sudan--Foreign relations--Sudan.
South Sudan--History--21st century.
South Sudan--Politics and government--2011-
Sudan--Foreign relations--South Sudan.
Sudan--History--1956-
Sudan--History--2011-
Sudan--Politics and government--1985-
Princeton subject headings:
South Sudan--Foreign relations--Sudan.
South Sudan--History--21st century.
South Sudan--Politics and government--2011-
Sudan--Foreign relations--South Sudan.
Sudan--History--1956-
Sudan--History--2011-
Sudan--Politics and government--1985-