المصادر
en.wikipedia.org/wiki/Origin_...
www.britannica.com/topic/Afro...
linguistics.byu.edu/classes/Li...
www.hrpub.org/download/2014100...
en.wikipedia.org/wiki/Noam_Ch...
www.cog.brown.edu/people/liebe...
blogs.discovermagazine.com/dea...
mathildasanthropologyblog.wor...
Негізгі бет [109] كيف نشأت وتطورت اللغات البشرية؟
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