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Hellwig DHR 1989. Discussion of papers by J.U. Grobbelaar, M.K. Seely and O.B. Kok.. Southern African Journal of Aquatic Sciences 15 (1) 129-133
Website link:http://www.tandfonline.com/doi/abs/10.1080/10183469.1989.9631302#.VGrzM1ItBHg
Hellwig DHR 1988. Challenging the Namib dune sea. Journal of the Limnological Society of southern Africa 14 (1) 35-40
Website link:http://www.tandfonline.com/doi/abs/10.1080/03779688.1988.9632888#.VGIRzFItBHg
Hellwig DHR 1973. Evaluation of water from sand, 3: The loss of water into the atmosphere from a sandy river bed under arid climatic condition. Journal of Hydrology 18 305-316
Downloadable files:
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Evaluation of water from sand.pdf 338.3 KB
Hellwig DHR 1968. A water quality study of the fresh water found around the Sandwich lagoon.
Hellwig DHR 1968. Water resources of the Namib Desert between Lüderitzbucht and Walvis Bay - a preliminary investigation.
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Water resources of the Namib Desert between Luederitzbucht and Walvis Bay.pdf 922.92 KB
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