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Not Only About the Ulmas. Assistance Offered on Polish Territory to Jewish People During the German Occupation 1939–1945 [PDF]
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The Risk of Survival. The Rescue of the Jews by the Poles and the Tragic Consequences for the Ulma Family from Markowa; Mateusz Szpytma Ph.D.
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The Righteous and the Merciful. The Rescue of Jews by the Poles and the Tragic Consequences for Ulma Family from Markowa