Variability in water supply, incomes & fees : illustrations of vicious circles from Sudan & Zimbabwe /
Tiffen, Mary.
Overseas Development Institute (London, England)
International Irrigation Management Institute.
London : Overseas Development Institute,
c1990.
Cover title.
At head of title: Odi-IIMI Irrigation Management Network.
"April 1990."
Includes bibliographical references (p. 22-23).