DescriptionRsos.191100.pdf English: The evolution of spoken languages has been studied since the mid-nineteenth century using traditional historical comparative...
dispersal of sign languages". Royal Society Open Science. 7 (1): 191100. doi:10.1098/rsos.191100. ISSN 2054-5703. PMC 7029929. PMID 32218940. (Check for updates)...
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