Senden, W.

Senden, W. & Salih, M.K., 1987. Water resources assessment and development programme in the Sudan (WADS) : progress report, 1 January 1986 - 1 June 1987, Delft, The Netherlands: TNO Institute for Applied Geoscience. Available at: https://fr.ircwash.org/sites/default/files/824SD.SO87-7428.pdf.