Columbia subject headings:
Egypt--Foreign relations--Sudan.
Egypt--Politics and government--1919-1952.
Sudan--Foreign relations--Egypt.
Harvard subject headings:
Egypt--Foreign relations--Sudan.
Egypt--Politics and government--1919-1952.
Sudan--Foreign relations--Egypt.
Princeton subject headings:
Egypt--Foreign relations--Sudan.
Egypt--Politics and government--1919-1952.
Sudan--Foreign relations--Egypt.