CHRISTELIS, G. & STRUCKMEIER, W. (2011): Groundwater in Namibia - an Explanation to the Hydrogeological Map. - Unrevised 2nd edition of Technical Cooperation Project "HYMNAM", prepared by DWA, GSN, NAMWATER & BGR: 128 p., Windhoek. (PDF, 8 MB)
Date of issue: January 15, 2013