[Student years of Nikolaĭ Evgen'evich Vvedenskiĭ].
D003148:Communism / Q000266:history; D049672:History, 19th Century; D010827:Physiology / Q000266:history; D012425:Russia (Pre-1917)
Iz studencheskikh let Nikolaia Evgen'evich Vvedenskiĭ.