Jacob Apenszlak· και άλλοι. (1943). «Mass-slaughter starts with invasion of Russia». The Black Book of Polish Jewry(PDF). American Federation for Polish Jews. pp. 113–114 (pp. 150–151 in PDF). OCLC1265138 – μέσω Internet Archive.
Jacob Apenszlak· και άλλοι. (1943). «Start of extermination in General Government». The Black Book of Polish Jewry(PDF). American Federation for Polish Jews. p. 122 (p. 159 in PDF). OCLC1265138 – μέσω Internet Archive.
Jacob Apenszlak· και άλλοι. (1943). «Mass-slaughter starts with invasion of Russia». The Black Book of Polish Jewry(PDF). American Federation for Polish Jews. pp. 113–114 (pp. 150–151 in PDF). OCLC1265138 – μέσω Internet Archive.
Jacob Apenszlak· και άλλοι. (1943). «Start of extermination in General Government». The Black Book of Polish Jewry(PDF). American Federation for Polish Jews. p. 122 (p. 159 in PDF). OCLC1265138 – μέσω Internet Archive.