Title:
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Soil, crop and water management systems for rainfed agriculture in the Sudano-Sahelian zone : proceedings of an international workshop, 11-16 January 1987, ICRISAT Sahelian Center, Niamey, Niger / [scientific editors, C. Renard, R.J. Van Den Beldt, J.F. Parr ; publication editors, T. Gaillard, V. Sadhana]
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