Polish Academy of Science

Polish Academy of Science

Letter to Tadeusz Kotarbiński written 23.02.1961

Letter from Stefan Żółkiewski written in 15.03.1968

Invitation to scientific discussion written n/d

Letter to the Polish Academy of Science written 04.10.1964

Letter from Roman Suszko written 15.02.1965

Letter to the Polish Academy of Science written 16.11.1968

Letter from Kazimierz Wyka written 19.02.1967

Postcard from Stefan Morawski written 05.12.1965

Letter from Ksawery Piwocki written 27.12.1964

Letter from Witold Nowacki written 31.08.1969

Letter to the Polish Academy of Science written 07.03.1966

Letter from Stefan Żółkiewski written in 07.07.1967