The study of Nakata-no-okimi's Tanka (No.7) of Man'yoshu ; On the Auxiliary Verb "Si" 論文 ヤスヒコ オガワ・Yasuhiko Ogawa・靖彦 小川・Yasuhiko OGAWA ·1994-03-25 ·pp. 1-32 National Institute of Informatics openalex.org