University in Poznan

University in Poznan

Letter to Kazimierz Ajdukiewicz written 6/15/1949

Letter from Kazimierz Ajdukiewicz written 21.06.1949

Letter to Kazimierz Ajdukiewicz written 15.06.1949

Letter from Kazimierz Ajdukiewicz written 6/21/1949