1. Abdi A, Bekele E, Asfaw Z, Teshome A (2002) Patterns of morphological variation of sorghum [Sorghum bicolor (L.) Moench] landraces in qualitative characters in North Shewa and South Welo, Ethiopia. Hereditas 137:161–172
2. Derbie S, Asfaw Z, Teshome A, Demissew S (2002) Management of agrobiodiversity in the Borkena watershed, South Welo, Ethiopia: farmers allocate crops/landraces to farm types. Ethiopian J Biol Sci 1(1):13–36
3. Doggett H (1988) Sorghum, 2nd edn. Longman, Burnt Mill, Harlow, Essex, England
4. Doggett H (1991) Sorghum history in relation to Ethiopia. In: Engels JM, Hawkes JG, Worede M (eds) Plant genetic resources of Ethiopia. Cambridge University Press, Cambridge
5. Dyer JA, Teshome A, Torrance JK (1992) A climate analysis package for land use planning in Ethiopia. Canadian Water Resour J 17(4):311–322