Columbia subject headings:
Sudan--Foreign relations--United States.
Sudan--History--Civil War, 1983---Peace.
Sudan--History--Civil War, 1983-2005--Peace.
United States--Foreign relations--Sudan.
Harvard subject headings:
Sudan--Foreign relations--United States.
Sudan--History--Civil War, 1983---Peace.
Sudan--History--Civil War, 1983-2005--Peace.
United States--Foreign relations--Sudan.
Princeton subject headings:
Sudan--Foreign relations--United States.
Sudan--History--Civil War, 1983-2005--Peace.
United States--Foreign relations--Sudan.