The USHMM states that it "has not been able to identify the copyright status of this material".[2]
References
Wikimedia Commons has media related to Sobibor perpetrator album.
^Lebovic, Matt (3 February 2020). "Sobibor photo album remaps Nazi death camp famous for 1943 prisoner revolt". Times of Israel. Retrieved 10 June 2020.
^"Sobibor perpetrator collection - Collections Search - United States Holocaust Memorial Museum". collections.ushmm.org. Retrieved 10 June 2020.
Further reading
Cüppers, Martin; Gerhardt, Annett; Graf, Karin; Hänschen, Steffen; Kahrs, Andreas; Lepper, Anne; Ross, Florian (2020). Fotos aus Sobibor (in German). Metropol Verlag. ISBN 978-3-86331-506-1.