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WikiPedia: Koto_(nhạc_cụ) http://gokuraku-shujo.blogspot.com/2014/02/am-nhac... http://www.oxfordartonline.com.ezproxy.umuc.edu/su... http://www.brill.nl/default.aspx?partid=18&pid=265... http://www.ket.org/artstoolkit/wodm/tour/africa/ke... https://web.archive.org/web/20161011044659/http://... https://commons.wikimedia.org/wiki/Category:Koto?u...