Polish researchers

Polish researchers

Letter from Władysław Witwicki written 12.02.1923

Letter from Juliusz Kleiner written 18.06.1935

Letter from Władysław Tatarkiewicz written 27.02.1966

Letter to Kazimierz Twardowski written 28.02.1936

Letter from Tadeusz Kotarbiński written 07.02.1966

Postcard from Kazimierz Ajdukiewicz written 10/10/1948

Postcard from Wacław Borowy written 16.02.1922

Letter from Władysław Witwicki written 02.07.1926

Postcard from Juliusz Kleiner written 22.08.1948

Postcard from Stefan Morawski written N/D

Letter to Władysław Tatarkiewicz written 30.12.1960

Postcard from Konstanty Michalski written N/D