Vertisols -- Africa -- Congresses : The sustainable management of vertisols / edited by J. Keith Syers, Frits Penning de Vries, and Phibion Nyamudeza ; with the assistance of Robin L. Leslie
2001
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Vertisols -- Congresses : The sustainable management of vertisols / edited by J. Keith Syers, Frits Penning de Vries, and Phibion Nyamudeza ; with the assistance of Robin L. Leslie