habilitation thesis

habilitation thesis

Letter from Kazimierz Twardowski written 10.05.1922

Letter to Kazimierz Twardowski written 05.08.1923

Letter from Kazimierz Twardowski written 06.02.1923

Letter to Kazimierz Twardowski written 01.04.1925

Letter from Kazimierz Twardowski written 08.01.1925

Letter from Kazimierz Twardowski written 19.07.1923

Letter from Mieczysław Wallis written 31.12.1961

Letter from Kazimierz Twardowski written 13.05.1924

Letter from Kazimierz Twardowski written 13.06.1924

Letter to Mieczysław Wallis written 22.01.1962

Letter from Kazimierz Twardowski written 13.08.1922