REFERENCES

IMAGE:Enigma Machine.JPG

http://www.pbs.org/wgbh/nova/

Produced for PBS Online by WGBH.Web site Š 1996-2001 WGBH Educational Foundation

ENIGMA MACHINE WEB PAGE CONTENT

http://www.bletchleypark.org.uk/history1.htm

The official website of The Bletchley Park^Ž Trust, a registered charity no. 1012743

WORKING OF ENIGMA MACHINE WEB PAGE CONTENT

http://www.codesandciphers.org.uk/enigma/

Created by Tony Sale the original curator of the Bletchley Park Museum, and Secretary of the Bletchley Park Heritage Society.