Sources
- http://www.yadvashem.org/yv/en/exhibitions/last-letters/1941/goldish.asp
- http://www.yadvashem.org/yv/en/exhibitions/last-letters/1941/schwartz.asp
- http://ww2.letters.ie/0001/0009.htm
- https://www.theguardian.com/world/2015/jan/27/auschwitz-short-history-liberation-concentration-
- http://www.history.com/topics/world-war-ii/the-holocaust/videos/the-holocaust