Usher, B. H.Ellington, R. G.2015-08-192015-08-192003-11http://hdl.handle.net/11660/946Abstract not availableenGroundwater studiesIrrigationSouth AfricaVaalhartsGroundwaterDissertation (M.Sc. (Institute for Groundwater Studies))--University of the Free State, 2003Quantification of the impact of irrigation on the aquifer underlying the Vaalharts irrigation schemeDissertationUniversity of the Free State