Andreini, M. Volta basin water balance / M. Andreini - Germany : Bonn University (BU) , 2000 - 29p. : ill. ; 27 cm. - ZEF Discussion Papers on Development Policy No. 21 . Includes bibliographical references Subjects--Topical Terms: Water resourcesRiver basinHydrology Gov. Doc. Class. No.: DE Bon.U CDR DP-21