Columbia subject headings:
Egypt--Foreign relations--Ethiopia.
Ethiopia--Foreign relations--Egypt.
Water resources development--Political aspects--Nile River Watershed.
Water-supply--Political aspects--Nile River Watershed.
Harvard subject headings:
Egypt--Foreign relations--Ethiopia.
Ethiopia--Foreign relations--Egypt.
Water resources development--Political aspects--Nile River Watershed.
Water-supply--Political aspects--Nile River Watershed.
Princeton subject headings:
Egypt--Foreign relations--Ethiopia.
Ethiopia--Foreign relations--Egypt.
Water resources development--Political aspects--Nile River Watershed.
Water-supply--Political aspects--Nile River Watershed.