Polish Academy of Science

Polish Academy of Science

Letter from Ksawery Piwocki written 27.12.1964

Letter to the Polish Academy of Science written 31.03.1965

Letter from Ksawery Piwocki written 11.11.1964

Letter to the Polish Academy of Science written 24.04.1969

Letter from Stefan Morawski written 27.10.1965

Letter to the Polish Academy of Science written 16.11.1968

Letter from Stefan Żółkiewski written in 07.07.1967

Letter to Tadeusz Kotarbiński written 23.02.1961

Letter from Stefan Żółkiewski written 14.04.1965

Letter from Kazimierz Wyka written 28.08.1968

Letter to the Polish Academy of Science written 15.09.1964

Letter to the Polish Academy of Science written 24.10.1963