Tham khảo Showak

  1. ↑ Dirani, Omar Hassan El; Jabbar, Mohammad Abdul; Babiker, Idris Babiker (2009). Constraints in the Market Chains for Export of Sudanese Sheep and Sheep Meat to the Middle East. ILRI (aka ILCA and ILRAD). tr. 27. ISBN 978-92-9146-195-0.
  2. ↑ Hurst, Harold Edwin; Phillips, P.; Black, R. P. (1950). The Nile Basin. Government Press. tr. 122.
  3. ↑ Masood, Ehsan; Schaffer, Daniel (2006). Dry: Life Without Water. Harvard University Press. tr. 18. ISBN 978-0-674-02224-9.
  4. ↑ Shepherd, Andrew; Norris, Malcolm; Watson, John R. (1987). Water planning in arid Sudan. Published for the Development Administration Group, Institute of Local Government Studies, University of Birmingham, by Ithaca Press. tr. 36. ISBN 978-0-86372-072-7.
  5. ↑ “Refugees and Asylum Seekers in Sudan” (PDF). UNHCR. Truy cập ngày 10 tháng 12 năm 2013.
  6. ↑ “El Showak Climate Normals 1961–1990”. National Oceanic and Atmospheric Administration. Truy cập ngày 18 tháng 1 năm 2016.

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