Linden, W. van der

van der Linden, W., 1986. Nyala water resources : a summary of the results of the WAPS-2 investigations at Wadi Nyala during 1983-1985, (Technical Bulletin 86-01) Khartoum, Sudan: National Water Corporation. Available at: https://es.ircwash.org/sites/default/files/824SDNY86-6609.pdf.