soviet statesman, educator and pedagogue (1893– 1978)
Russian Socialist Federative Soviet Republic
Faculty of Physics and Mathematics of Moscow Imperial University
Academy of Pedagogical Sciences of the USSR
deputy of the Supreme Soviet of the Soviet Union
Pedagogues and Psychologists of the World
22nd Congress of the Communist Party of the Soviet Union
21st Congress of the Communist Party of the Soviet Union
Regional Database of the Central Bohemian Research Library in Kladno