Back جورج فريدريك نيكولاي Arabic جورج فريدريك نيكولاى ARZ Georg Friedrich Nicolai Danish Georg Friedrich Nicolai German Georg Friedrich Nicolai Spanish Georg Friedrich Nicolai Estonian Georg Friedrich Nicolai French Georg Nicolai Polish Georg Friedrich Nicolai Portuguese Николаи, Георг Фридрих Russian
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Georg Friedrich Nicolai (born Lewinstein; 6 February 1874 – 8 October 1964) was a German physiologist.