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Postcard from Stefan Szuman written 22.07.1942

Letter from Tadeusz Kotarbiński written 19.05.1923

Letter from Stefan Szuman written nd.06.1942

Postcard from Stefan Szuman written 12.06.1942

Letter from Tadeusz Kotarbiński written 04.11.1926

Letter from Tadeusz Kotarbiński written 06.06.1923

Postcard from Tadeusz Kotarbiński written 02.05.1923

Postcard from Stefan Szuman written 12.05.1942

Letter from Tadeusz Kotarbiński written 16.04.1923

Postcard from Tadeusz Kotarbiński written nd.nd.nd

Postcard from Tadeusz Kotarbiński written 11.08.1923

Postcard from Stefan Szuman written 19.11.1942