Polish Academy of Science

Polish Academy of Science

Letter from Ksawery Piwocki written 11.11.1964

Letter to the Polish Academy of Science written 01.07.1963

Letter from Stefan Żółkiewski written in 07.07.1967

Letter from Stanisław Urbańczyk written 22.02.1965

Letter to the Polish Academy of Science written 31.03.1965

Letter from Kazimierz Wyka written 19.02.1967

Letter from Stefan Żółkiewski written in 29.05.1967

Letter from Stefan Żółkiewski written in 15.03.1968

Letter from Ksawery Piwocki written 27.12.1964

Letter from Kazimierz Wyka written 14.07.1967

Letter to the Polish Academy of Science written 07.03.1966

Letter from Stefan Morawski written 30.11.1965