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Bluelinking 1 books for verifiability.) #IABot (v2.1alpha3 |
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*{{citation
|last=Bickerton
|first=
|authorlink=Derek Bickerton
|title=Roots of Language
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|year=1981
|isbn=0-89720-044-6
|url-access=registration
|url=https://archive.org/details/rootsoflanguage0000bick
}}
*{{citation
|