Jewish Historical Institute in Warsaw, Holocaust Survivor Testimonies (coll. 301), Marta Klein Testimony (301/12). Original in Polish.
Testimony of Marta Klein on the actions against Jews in Vilnius and Białystok and deportations to Treblinka, her escape en route to the camp, her rescue by a Pole, Czuliński, and the arrest of her son and his protector after their betrayal.
Yad Vashem Archives, The Ball-Kaduri Collection: Contemporary testimonies and reports regarding the Holocaust of the Jews of Germany and Central Europe, 1943-1960 (O.1), file no. 3549264.Original in English.
Personal report by Max Mannheimer, born in 1918, regarding his experiences in Amsterdam, The Hague, Westerbork, Theresienstadt, and Auschwitz.
