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Management of vertisols in Sub-Saharan Africa : proceedings of a conference held at ILCA, Addis Ababa, Ethiopia 31 August-4 September 1987 / ed. by S.C. Jutzi...[et al.].
Addis Ababa : International livestock centre for Africa, 1988.
xiii, 435 p. : ill., graf., krt., tab. ; 22 cm.