PAN

PAN

Invitation to scientific discussion written n/d

Letter from Stefan Morawski written 30.11.1965

Letter from Stefan Żółkiewski written in 07.07.1967

Letter to the Polish Academy of Science written 05.03.1969

Letter from Kazimierz Ajdukiewicz written 3/12/1956

Letter from Stefan Żółkiewski written in 03.01.1968

Letter from Stefan Żółkiewski written in 22.02.1966

Letter from Kazimierz Wyka written 19.02.1967

Letter from Stefan Żółkiewski written in 12.02.1966

Letter to Irena Krońska written in 19.01.1955

Letter to Władysław Tatarkiewicz written 20.05.1961

Letter to the Polish Academy of Science written 22.09.1964