Prince Nikolai Sergeyevich Trubetzkoy (Russian: Николай Сергеевич Трубецкой [nʲɪkɐˈlaj sʲɪrˈɡʲe(j)ɪvʲɪtɕ trʊbʲɪtsˈkoj]; 16 April 1890 – 25 June 1938) was a Russian linguist and historian whose teachings formed a nucleus of the Prague School of structural linguistics. He is widely considered to be the founder of morphophonology. He was also associated with the Russian Eurasianists.
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