Poschen, Peter. (1986) 1986. “An Evaluation of the Acacia Albida-Based Agroforestry Practices in the Hararghe Highlands of Eastern Ethiopia”. Agroforestry Systems 4 (2): 129-43. doi:10.1007/BF00141545. DOIBibTeXEndNote X3 XMLEndNote 7 XMLRIS