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Soil fertility management in West African land use systems : proceedings of the Regional workshop [of the] University of Hohenheim, ICRISAT Sahelian centre and INRAN, 4-8 March 1997, Niamey, Niger = Gestion de la fertilité des sols dans les systèmes d'exploitation d'Afrique de l'Ouest / ed. Geneviève Renard...[et al.].
- Margraf,
- cop. 1998.
- Weikersheim :
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The evaluation of technical and institutional options for small farmers in West Africa : proceedings of an International workshop held on April 21-22-1998 at the University of Hohenheim as part of the special research programme 308 adapted farming in West Africa / ed. Peter Lawrence, Geneviève Renard and Matthias von Oppen.
- Margraf,
- cop. 1998.
- Weikersheim :