Naumann, Christfried (June 26, 2009). "Siwa". Leipzig, Germany: Department of Linguistics, Max Planck Institute for Evolutionary Anthropology. Archived from the original on 2019-11-12.
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Naumann, Christfried (June 26, 2009). "Siwa". Leipzig, Germany: Department of Linguistics, Max Planck Institute for Evolutionary Anthropology. Archived from the original on 2019-11-12.