↑『カラフトナヨロ惣乙名文書』第二文書 北海道大學付屬図書館蔵 乾隆四十年三月二十日(1775), Karafuto Nayoro Documents, No.2 Document (In Manchu language), a document in which a Chinese Qing Dynasty local official (the Deputy lieutenant-general of Ningguta) urged the Sakhalin Ainu chief to tribute.
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