File:Botvinnik 1933.jpgDescription: Mikhail Botvinnik Source: match book Botvinnik - Flohr 1933 Date: 1933 Author: not mentioned other versions: English determination method:
File:Botvinnik 1933m.jpgBrittle heaven 429×621× (72860 bytes) trimmed (modified) version of Botvinnik_1933.jpg on Commons, to correct poor framing. English determination method:
File:Salo Flohr 1933.jpgDescription: Salo Flohr Source: match book Botvinnik - Flohr, Moscow 1933 Date: 1933 Author: not mentioned
File:Botvinnik 72.jpgDescriptionBotvinnik 72.jpg English: Botvinnik in play against Salo Flohr, match 1933. Date 1933 Source Kuiper: Hundert Jahr Schach Zweikampfe. Amstardam
File:Флор, Ботвинник, 1933.jpgEnglish: Chess players Salo Flohr and Mikhail Botvinnik during their match in USSR, year 1933 Date 1933 Source https://chesspro.ru/_events/2009/voronkov_book