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\bibitem{Klock_etal2001} Klock, H., K{\"u}lls, C., \& Udluft, P. (2001). Quantification of Groundwater Recharge-Estimating recharge values using hydrochemical and geological data: A case study from the semiarid Kalahari catchment of northern Namibia. \textit{IAHS Publications-Series of Proceedings and Reports-Intern Assoc Hydrological Sciences}, \textit{269}, 25--32.

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