Assessment of land degradation, Its possible causes and threat to food security in Sub-Saharan Africa

Vlek, P.L.G; Le, Quang Bao; Temene, L. 2010. Assessment of land degradation, Its possible causes and threat to food security in Sub-Saharan Africa. In: Advances in Soil Science Food Security and soil quality / edited by Rattan Lal, B.A. Stewart.. CRC Press, Heidelberg, DE. p. 57-86.