File:Enigma-rotor-stack.jpg

The stack of rotors inside an Enigma machine, consisting of three rotors and Umkehrwalze-B (the reflector). Author agreed to license this photograph under

File:Enigma-rotor-stack-cropped.jpg

Slightly cropped version of Image:Enigma-rotor-stack.jpg. Author agreed to license this photograph under the terms of the GFDL after an email exchange

File:Technical Collaboration EMWCon 2016 Presentation.pdf

_Nick_Dec_2013.jpg https://commons.wikimedia.org/wiki/File:Lake_near_Sunnig_Grat_summit.JPG https://commons.wikimedia.org/wiki/File:Enigma-rotor-stack.jpg https://commons