invitation

invitation

Letter from Stefan Żółkiewski written in 01.03.1966

Letter to Mieczysław Wallis written 02.10.1967

Postcard to Kazimierz Twardowski written 24.08.1936

Letter from Stefan Szuman written 17.06.1938

Letter to the Polish Academy of Science written 15.09.1964

Letter from Konstanty Michalski written 22.01.1946

Letter from Tadeusz Czeżowski written 31.10.1965

Letter to Mieczysław Wallis written 03.08.1963

Letter to the Polish Academy of Science written 01.07.1963

Invitation to scientific discussion written n/d

Letter from Hanna Malewska written n/d

Letter to Stefan Żółkiewski written in 07.05.1964