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1
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2by Ri, Kaisei, 1935-Subjects “...Ri, Kaisei, 1935- Travel Russia (Federation) Sakhalin....”
Published 1983
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3Ainu moshiri : Ainu minzoku kara mita "Hoppō ryōdo henkan" kōshō /アイヌモシリ: アイヌ民族から見た北方領土返還交渉 /Published 1992Book
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4