PAN

PAN

Letter to the Polish Academy of Science written 22.09.1964

Letter to the Polish Academy of Science written 10.09.1963

Letter to the Polish Academy of Science written 04.10.1964

Letter to Władysław Tatarkiewicz written 10.05.1963

Invitation to scientific discussion written n/d

Letter to Anna Teresa Tymieniecka written 21.03.1969

Letter to the Polish Academy of Science written 18.01.1965

Letter to Kazimierz Wyka written 02.07.1967

Letter from Stefan Żółkiewski written in 19.03.1968

Letter from Stefan Morawski written 03.06.1964

Letter to Władysław Tatarkiewicz written 27.06.1969

Letter to the Polish Academy of Science written 19.10.1963