Columbia subject headings:
Nile River--Religious aspects--Islam.
Sudan--Politics and government--Miscellanea.
Water resources development--Moral and ethical aspects--Miscellanea.
Water resources development--Sudan--Miscellanea.
Harvard subject headings:
Nile River--Religious aspects--Islam
Sudan--Politics and government--Miscellanea.
Water resources development--Moral and ethical aspects--Miscellanea.
Water resources development--Sudan--Miscellanea.
Princeton subject headings: