PAN

PAN

Letter to Tadeusz Kotarbiński written 23.02.1961

Letter to Władysław Tatarkiewicz written 05.07.1968

Letter to the Polish Academy of Science written 15.09.1964

Letter to the Polish Academy of Science written 22.12.1965

Letter from Kazimierz Ajdukiewicz written 3/12/1956

Letter from Polish Academy of Science written 21.04.1966

Letter to Władysław Tatarkiewicz written 12.08.1968

Letter to Władysław Tatarkiewicz written 28.04.1970

Letter to Władysław Tatarkiewicz written 09.12.1954

Certificate from Irena Krońska written in 10.06.1955

Letter from Adam Schaff written 12.06.1962

Letter to the Polish Academy of Science written 19.10.1963