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እ አ አ በ1969 የታተመዉና ‘Tef (Eragrostis tef): the Cultivation, Usage and Some of the Known Diseases and Insect’. Part I. Experiment Station Bulletin 60. HSIU, College of Agriculture, Dire Dawa, Ethiopia እና
በ1975 የታተመዉና ‘Tef (Eragrostis tef) cultivar: Morphology and Classification’. Part II. Experiment Station Bulletin 66. Addis Ababa University, College of Agriculture, Dire Dawa, Ethiopia የተባሉት ናቸዉ፡፡
ለጤፍ ተመራማሪዎች በከፍተኛ ደረጃ የሚያገለግለዉ የሁለተኛዉ የዶ/ር ታደሰ ኤባ መጽሐፍ የፊት ሽፋን ይህንን ይመስላል፡፡ ምንጭ፤ Ebba T. 1975. Tef (Eragrostis tef) cultivar: Morphology and Classification. Part II. Experiment Station Bulletin 66. Addis Ababa University, College of Agriculture, Dire Dawa, Ethiopia
ምንጭ፤ Ebba T. 1975. Tef (Eragrostis tef) cultivar: Morphology and Classification. Part II. Experiment Station Bulletin 66. Addis Ababa University, College of Agriculture, Dire Dawa, Ethiopia
ምንጭ፤ Ebba T. 1975. Tef (Eragrostis tef) cultivar: Morphology and Classification. Part II. Experiment Station Bulletin 66. Addis Ababa University, College of Agriculture, Dire Dawa, Ethiopia
ምንጭ፤ Ebba T. 1975. Tef (Eragrostis tef) cultivar: Morphology and Classification. Part II. Experiment Station Bulletin 66. Addis Ababa University, College of Agriculture, Dire Dawa, Ethiopia