Polish Academy of Science

Polish Academy of Science

Letter from Stanisław Urbańczyk written 22.02.1965

Letter to the Polish Academy of Science written 15.09.1964

Letter to the Polish Academy of Science written 01.07.1963

Letter to the Polish Academy of Science written 31.03.1965

Letter from Stefan Morawski written 03.06.1964

Letter to Tadeusz Kotarbiński written 23.02.1961

Letter from Roman Suszko written 15.02.1965

Letter from Ksawery Piwocki written 11.11.1964

Postcard from Stefan Morawski written N/D 2

Letter from Henryk Markiewicz written 15.07.1963

Letter from Kazimierz Wyka written 14.07.1967

Letter to the Polish Academy of Science written 05.03.1969