Okinawan-English Wordbook 図書 Mitsugu Sakihara ·2006-12-31 ·『University of Hawaii Press eBooks』 doi:10.1515/9780824841683
The Role of Contact in the Origins of the Japanese and Korean Languages 図書 J. Marshall Unger ·2009-12-31 ·『University of Hawaii Press eBooks』 doi:10.1515/9780824891015