Columbia subject headings:
Sudan--Foreign relations--United States.
Sudan--Politics and government--1985-
United States--Foreign relations--Sudan.
Harvard subject headings:
Sudan--Foreign relations--United States.
Sudan--Politics and government--1985-
United States--Foreign relations--Sudan.
Princeton subject headings:
Sudan--Foreign relations--United States.
Sudan--Politics and government--1985-
United States--Foreign relations--Sudan.