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WikiPedia: Tiếng Lak http://glottolog.org/resource/languoid/id/lakk1252 http://ilchi.etnosmi.ru/ https://web.archive.org/web/20110818090711/http://... http://titus.fkidg1.uni-frankfurt.de/didact/caucas... https://web.archive.org/web/20090413144902/http://... https://web.archive.org/web/20220402173608/https:/... https://viewer.rusneb.ru/ru/rsl01005509731?page=17... http://www.eki.ee/knab/lat/kbllbe.pdf https://web.archive.org/web/20150427200122/http://... https://www.jstor.org/stable/2949334?read-now=1&se...