Hudson, R.A. (1980) “Languages,”In: Sociolinguistics ... · Varieties of language assumption...
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Hudson, R.A. (1980) “Languages,”In: Sociolinguistics. Cambridge: CUP, pp. 30-38.
Hudson, R.A. (1980) “Languages,”In: Sociolinguistics ... · Varieties of language assumption that they are both 'descended', through historical changes, from a common 'ancestor
