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Alemayehu และผู้แต่งคนอื่นๆ. 2011. Impact of soil conservation on crop production and food security in Eastern Ethiopia. , Kasetsart University;
Alemayehu และผู้แต่งคนอื่นๆ. (2011) Impact of soil conservation on crop production and food security in Eastern Ethiopia . Kasetsart University/Bangkok.
Alemayehu และผู้แต่งคนอื่นๆ. Impact of soil conservation on crop production and food security in Eastern Ethiopia. . Bangkok:Kasetsart University, 2011.
Alemayehu และผู้แต่งคนอื่นๆ. (2011) Impact of soil conservation on crop production and food security in Eastern Ethiopia . Kasetsart University/Bangkok.