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Letter to Kazimierz Twardowski written 19.08.1919

Letter to Tadeusz Czeżowski written 15.09.1949

Letter from Stanisław Ignacy Witkiewicz written 09.02.1939

Letter from Stanisław Ignacy Witkiewicz written 14.02.1939

Letter from Władysław Tatarkiewicz written 11.01.1961

Letter to Kazimierz Twardowski written 16.08.1923

Letter from Tadeusz Czeżowski written 24.01.1967