invitation

invitation

Postcard from Henryk Elzenberg written 24.03.1950

Letter from Stefan Żółkiewski written in n.d.

Letter from Kazimierz Ajdukiewicz written 01.10.1948

Letter to the Polish Academy of Science written 11.03.1965

Letter to the Polish Academy of Science written 01.07.1963

Letter to Tadeusz Czeżowski written 19.10.1954

Postcard from Stefan Szuman written 23.11.1936

Letter from Stanisław Ignacy Witkiewicz written 04.11.1937

Letter from Anna Teresa Tymieniecka written 20.07.1969

Letter to Stefan Żółkiewski written in 06.03.1966

Postcard from Stefan Szuman written 22.07.1942

Letter from Stefan Żółkiewski written in 07.07.1967