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Ntare, B R and Ndjeunga, J and Waliyar, F and Kodio, O and Echekwu, C A and Kapran, I and Da Sylva, A and Diallo, A T and Amadou, A and Bissal, H Y and Sako, K (2008) Farmer Participatory Evaluation and Dissemination of Improved Groundnut Varieties in West Africa. Manual. International Crops Research Institute for the Semi-Arid Tropics.