Boubou Diallo, M and Akponikpe, P B I and Abasse, T and Fatondji, D and Agbossou, E K (2019) Why is the spatial variability of millet yield high at farm level in the Sahel? Implications for research and development. Arid Land Research and Management (TSI). pp. 1-24. ISSN 1532-4982