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Letter from Tadeusz Kotarbiński written 14.01.1926

Postcard from Tadeusz Kotarbiński written nd.nd.nd

Letter from Stefan Szuman written 18.12.1942

Letter from Kazimierz Ajdukiewicz written 05.04.1918

Postcard from Stefan Szuman written 14.01.1943

Postcard from Tadeusz Kotarbiński written 23.10.1923

Postcard from Stefan Szuman written 22.09.1942

Letter from Tadeusz Kotarbiński written 18.12.1926

Postcard from Stefan Szuman written 19.11.1942

Postcard from Stefan Szuman written 28.05.1942

Postcard from Tadeusz Kotarbiński written 11.08.1923

Postcard from Stefan Szuman written 12.06.1942