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archive

Letter from Stefan Szuman written 29.01.1943

Letter from Kazimierz Ajdukiewicz written 03.11.nd

Letter to the Committee of the Library of Classics of Philosophy written 18.07.1951

Letter from Władysław Witwicki written 26.04.1923

Letter from Władysław Witwicki written 07.07.1922

Letter to the National Scientific Publishers written 10.12.1954

Postcard from Stefan Morawski written 16.04.1966

Letter to the Polish Academy of Science written 19.10.1963

Letter from Stanisław Wędkiewicz written 05.03.1948

Letter from Stanisław Wędkiewicz written 28.05.1948

Letter to Tadeusz Kotarbiński written 17.07.1948

Letter to Władysław Tatarkiewicz written 20.01.1961