Testimony of A. Gerszuni, born in Bialystok, Poland, 1921, regarding the fate of the Jewish underground in the Bialystok Ghetto and his experiences in Auschwitz, Buchenwald, Gross-Rosen and Dachau Preparations of youth in the Bialystok Ghetto for resistance activities against the Germans; forced labor at building; contact with Soviet POWs; rescue of Soviet POWs by members of the Jewish underground in the Bialystok Ghetto including transmitting information regarding the battlefront situation and provision of food, cigarettes and medicines; deportation to Auschwitz; life in Auschwitz; transfer to Buchenwald; life in Buchenwald; transfer to Gross-Rosen; life in Gross-Rosen; transfer to Dachau; life in Dachau.