organizational issues

organizational issues

Letter to Kazimierz Twardowski written 22.10.1921

Letter to Kazimierz Ajdukiewicz written 15.06.1949

Letter from Juliusz Kleiner written 11.09.1945

Letter from Władysław Witwicki written 13.07.1922 A

Letter to the Polish Academy of Science written 01.07.1963