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Postcard from Kazimierz Ajdukiewicz written 04.08.1925

Postcard from Stefan Szuman written 12.06.1942

Postcard from Stefan Szuman written 28.05.1942

Postcard from Kazimierz Ajdukiewicz written 17.03.1923

Letter from Stefan Szuman written nd.06.1942

Letter from Kazimierz Ajdukiewicz written 01.12.1927

Letter from Tadeusz Kotarbiński written 16.04.1923

Letter from Tadeusz Kotarbiński written 06.06.1923

Postcard from Stefan Szuman written 10.02.1943

Postcard from Tadeusz Kotarbiński written 11.08.1923

Postcard from Stefan Szuman written 19.11.1942

Letter from Stefan Szuman written 18.12.1942