Baring, S. (2000) The road to Station X. Bishop Wilton, York: UK Flat Top House.
The road to Station X
Briggs, A. (2012) Secret days: code-breaking in Bletchley Park. Yorkshire, UK: Pen & Sword.
Secret days: code-breaking in Bletchley Park
Brunt, R. M. (2001) ‘Indexing the intelligence’, The Indexer 22(4), 187–90.
Indexing the intelligence
The Indexer
22
187
90
Brunt, R. M. (2006) ‘Special documentation systems at the Government Code and Cypher School, Bletchley Park, during the second world war’, Intelligence and National Security 21(1), 129-–48.
Special documentation systems at the Government Code and Cypher School, Bletchley Park, during the second world war
Intelligence and National Security
21
129
48
Calvocoressi, P. (1980) Top secret ultra: an insiders account of how British intelligence monitored and broke the Nazi top-secret codes. New York: Pantheon.
Top secret ultra: an insiders account of how British intelligence monitored and broke the Nazi top-secret codes
CCHT (Codes & Ciphers Heritage Trust) (2017) The wartime history of the buildings. www.codesandciphers.org.uk
Columbia University Computing History (2017) The IBM 405 Alphabetical Accounting Machine. www.columbia.edu/cu/computinghistory/405.html
Grace’s Guide (2018) British Tabulating Machine Co. www.gracesguide.co.uk
Fierheller, G. A. (2014) Do not fold, spindle, or mutilate: the ‘hole’ store of punched cards. Ontario, Canada: Stewart.
Do not fold, spindle, or mutilate: the ‘hole’ store of punched cards
Greenberg, J. (2014) Gordon Welchman: Bletchley Park’s architect of ultra intelligence. London: Frontline.
Gordon Welchman: Bletchley Park’s architect of ultra intelligence
Hinsley, F. H. and Stripp, A. (1993) Codebreakers: the inside story of Bletchley Park. Oxford: Oxford University Press.
Codebreakers: the inside story of Bletchley Park
Lavell, C. (2018). Personal correspondence with the author.
Personal correspondence with the author
Lewin, R. (1978) Ultra goes to war: the first account of World War II’s greatest secret based on official documents. New York: McGraw-Hill.
Ultra goes to war: the first account of World War II’s greatest secret based on official documents
Luhn, H. P. (1957) ‘A statistical approach to mechanized encoding and searching of literary information’, IBM Journal 1(4), 309–17.
A statistical approach to mechanized encoding and searching of literary information
IBM Journal
1
309
17
Marden, E. C. (1965) ‘HAYSTAQ: A mechanized system for searching chemical information,’ National Bureau of Standards, Technical Note 264. Washington DC: US Government Printing Office.
HAYSTAQ: A mechanized system for searching chemical information
McKay, S. (2013) The lost world of Bletchley Park: an illustrated history of the wartime codebreaking centre. London: Aurum Press in association with Bletchley Park.
The lost world of Bletchley Park: an illustrated history of the wartime codebreaking centre
Perry, J. W. and Casey, R. S. (1952) ‘Mechanized searching.’ Encyclopedia of Chemical Technology, Vol. 8. New York: Interscience Encyclopedia.
Mechanized searching
Encyclopedia of Chemical Technology
Pugh, E. W. (2009) Building IBM: shaping an industry and its technology. Cambridge, Mass.: MIT Press.
Building IBM: shaping an industry and its technology
Simpson, E. (2011a) ‘Solving JN-25 at Bletchley Park: 1943–1945,’ pp. 127–46 in R. Erskine and M. Smith (eds), The Bletchley Park codebreakers. Croydon, UK: CPI Group.
Solving JN-25 at Bletchley Park: 1943–1945
The Bletchley Park codebreakers
127
46
Simpson, E. (2011b). Appendix VI: Recovering by differencing. pp. 402–5 in R. Erskine and M. Smith (eds), The Bletchley Park codebreakers. Croydon, UK: CPI Group.
The Bletchley Park codebreakers
402
5
Smith, M. (1998) Station X: the codebreakers of Bletchley Park. London: Macmillan.
Station X: the codebreakers of Bletchley Park
Smith, M. (2011) The secrets of Station X: how the Bletchley Park codebreakers helped win the war. London: Biteback.
The secrets of Station X: how the Bletchley Park codebreakers helped win the war
Smith, M. (2015) The debs of Bletchley Park, and other stories. London: Aurum.
The debs of Bletchley Park, and other stories
US Army (1943) German military abbreviations. Washington DC: War Department.
US General Services Administration (1965) Source Data Automation, FPMV 11.5, Federal Stockton Number 7610-782-2670. Copy obtained from the Central Intelligence Agency.
USHMM (US Holocaust Memorial Museum) (2017) Hollerith Machine. www.jewishvirtuallibrary.org
UK Channel 4 (1999) Station X: The Ultra Secret, episode 4 of Station X: The Codebreakers of Bletchley Park. http://bufvc.ac.uk/dvdfind/index.php/title/20346 (accessed 1 May 2018)
Wallis, E. and Lavell, C. (2000) ‘The index of Enigma messages’, The Indexer 22(1), 31–3.
The index of Enigma messages
The Indexer
22
31
3
Welchman, G. (1982) The Hut Six story: breaking the Enigma codes. Kidderminster, UK: M & M Baldwin.
The Hut Six story: breaking the Enigma codes
Whelan, R. (1990s) The Use of Hollerith punched card equipment in Bletchley Park. United Kingdom National Archives, Catalog Number HW 25/22.
The Use of Hollerith punched card equipment in Bletchley Park