Nicolai Ivanovich Andrusov
Nicolai Ivanovich Andrusov (Russian: Николай Иванович Андрусов, romanized: Nikolay Ivanovich Andrusov; Ukrainian: Микола Іванович Андрусов, romanized: Mykola Ivanovych Andrusov; 19 December 1861 – 27 April 1924) was a Russian geologist, stratigrapher, and palaeontologist.