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- Fraser, Lauchlan H.; Keddy, Paul A. (2005). The world's largest wetlands: ecology and conservation. Cambridge University Press. p. 354. ISBN 978-0-521-83404-9. Retrieved 4 August 2011.
- Dupuis, C. E. (1904). Report upon the basin of the Upper Nile: with proposals for the improvement of that river. National Printing Department. p. 130. Retrieved 4 August 2011.
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