Books Air Photo Evidence: Auschwitz, Treblinka, Majdanek, Sobibor, Bergen Belsen, Belzec, Babi Yar, Katyn Forest (1992)
[archiveorg Air_Photo_Evidence width=560 height=384 frameborder=0 webkitallowfullscreen=true mozallowfullscreen=true]
https://archive.org/download/Air_Photo_Evidence/Air_Photo_Evidence.pdf
