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Letter to Kazimierz Twardowski written 30.04.1919

Letter to Kazimierz Twardowski written 19.03.1924

Letter from Anna Teresa Tymieniecka written 13.12.1960

Postcard from Tadeusz Czeżowski written 24.05.1950

Letter to Tadeusz Czeżowski written 12.12.1957

Letter to Tadeusz Kotarbiński written 12.10.1949

Letter to Kazimierz Twardowski written 31.10.1919

Letter from Stanisław Ignacy Witkiewicz written 01/02.03.1938

Letter from Irena Krońska written in 17.11.1954

Letter to Mieczysław Wallis written 17.01.1962

Letter from Tadeusz Czeżowski written 27.01.1950

Letter to Kazimierz Twardowski written 27.01.1923