By The Encyclopaedia Britannica, Inc.
Links for Sergei Winogradsky (1856–1953):
-
https://www.britannica.com/biography/Sergey-Nikolayevich-Winogradsky
-
By Famous Scientists, an educational resource focusing on the lives and achievements of the most famous scientists and inventors in history.
https://www.famousscientists.org/sergei-winogradsky/ -
By Russia-IC, dedicated to bringing together such aspects as Russia's alluring culture, rich history, strong education and science background, burgeoning business, unpredictable politics and its vibrant and talented people.
http://russia-ic.com/people/general/w/311 -
By Wikipedia, the free encyclopedia.
https://en.wikipedia.org/wiki/Sergei_Winogradsky
