%A Beckwith, Christopher I. %T Koguryo, the language of Japan's continental relatives : an introduction to the historical-comparative study of the Japanese-Koguryoic languages with a preliminary description of Archaic northeastern Middle Chinese %I Brill %D 2004 %S Brill's Japanese studies library %V v. 21 %U https://ci.nii.ac.jp/ncid/BA67876676