Berhanu, Fanta Alemaw Mathematical modelling of the main river channels of the upper Nile basin - Dar es salaam : University of Dar es Salaam, 1995. - xiv, 141p. : ill. ; 30cm. Includes bibliographical references and index Subjects--Topical Terms: WaterSupply engineeringUpper Nile Basin LC Class. No.: THS EAF QA911.B42