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עבודותיו

Lexique Soqotri (sudarabique moderne) avec comparaisons et explications etymologiques. Paris: Klinncksieck, 1938
Documents Tigrigna: grammaire et textes. Paris, Library C. Klicksieck, 1941
Short Grammer of Tigre. Publications of the American Oriental Society, Offprint Series, No. 18, New Haven, 1945
Gafat Documents: Records of a South-Ethiopic Language. American Oriental series, no. 28, New Haven, 1945
Ethiopic Documents: Gourage. New York, Viking Fund Publications in Anthropolgy, no. 14, 1950
Falasha Anthropolgy. Yale Judaica Series, vol. 6, New Haven & London, Yale University Press, 1951
Etude Descriptive et Comparative du Gafat (ethiophian meridional). Paris, Klincksieck, xx+270 p., 1956
Ethiopic and South Arabic Contributions to the Hebrew Lexicon. Berkeley, University, University of California Press, x + 76 p., 1958
The Verb in Harari. Berkeley, University of California Press, x + 86 p., 1958
An Amharic Conversation Book. Wiesbaden, Harrassowitz, 1965
Ethiopians Speak. Studies in Cultural Background. Part 1: Harari. Near Eastern Studies, no. 7, Berkeley, University of California Press, 1965
Ethiopian Speak: Studies in Cultural Background. Part 2: Chaha. University of California Publications, Near Eastern Studies, no. 9, 219 p. 1966
Amharic Textbook. Wiesbaden, Harrasowitz, 1967
Ethiopian Speak: Studies in Cultural Background. Part 3: Soddo. Univerity of California Publications, Near Eastern Studies, vol. 11, 1968
Hebrew Cognates in Amharic. Wiesbaden, Harrassowitz, 1969
English-Amharic Context Dictionary. Wiesbaden, Harrassowitz, xviii + 1503p., 1973
Concise Amharic Dictionary. Reissue edion 1996. Berkeley and Los Angeles, University of California Press, 1976
Etymologycal Dictionary of Gurage (Ethiopic). 3 vols. Wiesbaden, Otto Harrassowitz, 1979
Ethiopians Speak: Studies in Cultural Background, Part 4: Muher Athiopistische Forschungen, no. 11, Wiesbaden, Franz Steiner Verlag, 1981
Gurage Folklore: Proverbs, Beliefs, and Riddles. Studien zur Kulturkunde, no. 63. Wiesbaden, Franz Steiner Verlag, 1982
Ethiopians Speak: Studies in Cultural Background. Part 5: Chaha and Ennemor. Athiopistische Forschungen, no. 16. Wiesbaden, Franz Steiner Verlag, 1983
Comparative Dictionary of Ge'ez (Classical Ethiopic) Ge'ez-English/English-Ge'ez with an English of the Semitic Roots. Wiesbaden, Harrassowitz, xlix + 813 p., 1987
Fifty Years of Reaserch: Selection of Articles on Semitic, Ethiopian Semitic and Cushitic. Wiesbaden, Harrassowitz, xlv + 503 p., 1988
Concise Dictionary of Ge'ez (Classical Ethiopic) Wiesbaden, Harrassowitz, 247. p, 1989
Arabic Loanwords in Ethiopian Semitic. Wiesbaden, Harrassowitz, 1990
Gurage Studies: Collected Articles. Wiesbaden, Harrassowitz, xxix + 744 p., 1992
Reference Grammer of Amharic. Harrasowitz, Wiesbaden, 1995
Ethiopic Documents: Agrobba. Grammer and Dictionary. Wiesbaden, Harrassowitz, 1997
Zway Ethiopic Documetns. Athiopistische Forschungen no. 51. Wiesbaden, Harrassowitz, 1999
Introductory Grammar of Amharic. Wiesbaden, Harrasowitz, xix + 232 p., 2000
Amharic Cultural Reader (with Thomas L. Kane) Wiesbaden, Harrassowitz, 2001
The Verb in Masqan as Compared with other Gurage Dialects. Wiesbaden, Harrassowitz, 2004