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.
The Wiener Library for the Study of the Holocaust and Genocide, Eyewitness testimony Collection (coll. 1656), 540. Original in German
Testimony of Julia (Maria) Abraham-Stern, a trained seamstress. Her husband and son were deported, while she and her daughter were sent to the Lwów Ghetto with her parents. Her mother committed suicide to allow her to go into hiding with her daughter…