Dufour, F.C.

Dufour, F.C., 1991. Water resources assessment Yemen : final review of the WRAY project phases 2 and 3 : 1985 - 1990, Delft, The Netherlands: TNO Institute for Applied Geoscience. Available at: https://fr.ircwash.org/sites/default/files/823-YE91-8952.pdf.