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Hergarten, Chris (2008). Potentials and Limitations of Internet-based Geoprocessing Tools for Watershed Management. In: Zeleke, Gete; Alemu, Betre; Hergarten, Christian; Krauer, Jürg (eds.) Consultation Workshop on National Spatial Data Infrastructure and Ethio-GIS (2nd Release). Workshop Proceedings. Addis Abeba, November 28, 2007 (pp. 17-22). Bern: CDE / NCCR North-South
Hergarten, Chris (2008). Free Spatial Databases and Open-source Tools - Underestimated Means for Supporting NSDI and Natural Resources Management Projects? In: Zeleke, Gete; Alemu, Betre; Hergarten, Christian; Krauer, Jürg (eds.) Consultation Workshop on National Spatial Data Infrastructure and Ethio-GIS (2nd Release). Workshop Proceedings. Addis Abeba, November 28, 2007 (pp. 23-32). Bern: CDE / NCCR North-South
