Columbia subject headings:
Egypt--Foreign relations--South Sudan.
Secession--South Sudan.
South Sudan--Foreign relations--Egypt.
South Sudan--Politics and government.
Harvard subject headings:
Egypt--Foreign relations--South Sudan.
Egypt--Politics and government--21st century.
South Sudan--Foreign relations--Egypt.
South Sudan--Politics and government--21st century.
Princeton subject headings:
Egypt--Foreign relations--South Sudan.
Egypt--Politics and government--21st century.
South Sudan--Foreign relations--Egypt.
South Sudan--Politics and government--21st century.