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Kogan, Leonid (2015) Genealogical Classification of Semitic. The Lexical Isoglosses, Berlin: Walter de Gruyter, ISBN 978-1-61451-726-9
Kogan, Leonid (2015) Genealogical Classification of Semitic. The Lexical Isoglosses, Berlin: Walter de Gruyter, ISBN 978-1-61451-726-9