Columbia subject headings:
Harvard subject headings:
Horn of Africa--Foreign relations--21st century.
Water-supply--Horn of Africa.
Water-supply--Political aspects--Nile River Watershed.
Watershed management--Nile River Watershed--International cooperation.
Princeton subject headings:
Horn of Africa--Foreign relations--21st century.
Water-supply--Horn of Africa.
Water-supply--Political aspects--Nile River Watershed.
Watershed management--Nile River Watershed--International cooperation.