Search for: [Subject and Keywords = sources] OR [Subject and Keywords = social history of Russia \(20 c.\)] OR [Subject and Keywords = russian youth \(20 c.\)] OR [Subject and Keywords = Młodzież \-\- źródła \-\- historia społeczna \-\- 20 w. \-\- Rosja \[JHPBN\]] OR [Subject and Keywords = Rosja \-\- źródła \-\- historia społezna \-\- 20 w. \[JHPBN\]] OR [Title = Do młodzieży] OR [Title = Do młodzieży] OR [Creator = Kropotkin, Petr Alekseevič \(1842–1921\)] OR [Creator = Kropotkin, Petr Alekseevič \(1842–1921\)]