Deudney, Daniel Rivers of energy : the hydropower potential / Daniel Deudney - Washington : Worldwatch Institute (WI) , 1981 - 55p. :ill. ; 20 cm. - Worldwatch paper No. 44 . Includes bibliographical references. Subjects--Topical Terms: HydrologyEnergyRivers Gov. Doc. Class. No.: US WI P-44