habilitation

habilitation

Letter to Kazimierz Twardowski written 04.11.1923

Letter from Kazimierz Twardowski written 17.08.1924

Letter to Mieczysław Wallis written 17.01.1962

Letter from Kazimierz Twardowski written 25.11.1924

Letter from Stefan Morawski written 07.12.1961

Letter to Kazimierz Twardowski written 29.03.1923

Letter to Kazimierz Twardowski written 14.01.1925

Letter to Władysław Tatarkiewicz written 26.10.1965

Letter from Mieczysław Wallis written 31.12.1961

Letter from Władysław Witwicki written 03.08.1925

Letter to Kazimierz Twardowski written 13.05.1925

Letter to Władysław Tatarkiewicz written 27.06.1968