著者名,書名,版表示,出版者名,出版年,シリーズ名,番号,ISBN,ISSN,URL "Unseth, Peter",Linguistic bibliography of the non-Semitic languages of Ethiopia,,"African Studies Center, Michigan State University",1990,Monograph (Michigan State University. Committee on Northeast African Studies),,,,https://cir.nii.ac.jp/crid/1130000795026822144