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< /yɑn ɪgˈnɑ tsɪ ˈnyɛ tsɪsˌlɑf/, 1845–1929, Polish linguist: pioneer in modern phonology.
Jan Baudouin de Courtenay – Wikipedia, la enciclopedia libre
Baudouin de Courtenay, Jan
Jan Baudouin de Courtenay – Wicipedia
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Jan Baudouin de Courtenay – Alchetron, the free social encyclopedia