Hazlewood, Arthur. Irrigation economics in poor countries : illustrated by the Usangu Plains of Tanzania / by Arthur Hazlewood and Ian Livingstone. - 1st ed. - Oxford ; New York : Pergamon Press, 1982. - viii, 144 p. : ill. ; 22 cm. ISBN: 008027451X : Subjects--Topical Terms: Irrigation--Economic aspects--Developing countries. Dewey Class. No.: 333.913 / HAI 1982