Goats and Sheep in the Traditional Livestock Production Systems in Semi-Arid Northern Africa: Their Importance, Productivity and Constraints on Production
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2008 ◽
Vol 42
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pp. 71-85
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1993 ◽
Vol 36
(3)
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pp. 203-211
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2010 ◽
Vol 158
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pp. 1-17
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2002 ◽
Vol 473
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pp. 27-37
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