Gebrekristos, Sirak Tekleab Understanding catchment processes and hydrological modelling in the abay/upper blue nile basin, Ethiopia by Sirak Tekleab Gebrekristos - Leiden CRC Press 2015 - xvi,168 ISBN: 9781138027923 Subjects--Topical Terms: PL Dewey Class. No.: 551.48 / GEB-U