Government Code and Cypher School (Catalan Wikipedia)

«Welcome to GCHQ», 22-10-2014. Arxivat de l'original el 2014-10-22. [Consulta: 8 desembre 2024].
«New office buildings and the move, 1952-1954», 05-10-2006. Arxivat de l'original el 2006-10-05. [Consulta: 8 desembre 2024].

google.cat (Global: 1,849^th place; Catalan: 2^nd place)

books.google.cat

Leong, Dr Angela Veng Mei. The Disruption of International Organised Crime: An Analysis of Legal and Non-Legal Strategies (en anglès). Ashgate Publishing, Ltd., 2013-02-28. ISBN 978-1-4094-9595-6.
«GCHQ - Richard Aldrich - Google Books», 04-04-2023. Arxivat de l'original el 2023-04-04. [Consulta: 8 desembre 2024].

theguardian.com (Global: 12^th place; Catalan: 35^th place)

«NSA files: why the Guardian in London destroyed hard drives of leaked files | US news | The Guardian», 04-02-2017. Arxivat de l'original el 2017-02-04. [Consulta: 8 desembre 2024].

theregister.co.uk (Global: 1,216^th place; Catalan: 1,113^th place)

«REVEALED: GCHQ's BEYOND TOP SECRET Middle Eastern INTERNET SPY BASE • The Register», 25-06-2014. Arxivat de l'original el 2014-06-25. [Consulta: 8 desembre 2024].

theregister.com (Global: 3,700^th place; Catalan: 8,141^st place)

«INSIDE GCHQ: Welcome to Cheltenham's cottage industry • The Register», 06-09-2021. Arxivat de l'original el 2021-09-06. [Consulta: 8 desembre 2024].

uniset.ca (Global: low place; Catalan: low place)

«R. v. Home Secretary, ex p. Hosenball», 21-05-2016. Arxivat de l'original el 2016-05-21. [Consulta: 8 desembre 2024].

web.archive.org (Global: 1^st place; Catalan: 1^st place)

«Welcome to GCHQ», 22-10-2014. Arxivat de l'original el 2014-10-22. [Consulta: 8 desembre 2024].
«A simple guide to GCHQ's internet surveillance programme Tempora (Wired UK)», 15-05-2016. Arxivat de l'original el 2016-05-15. [Consulta: 8 desembre 2024].
«NSA files: why the Guardian in London destroyed hard drives of leaked files | US news | The Guardian», 04-02-2017. Arxivat de l'original el 2017-02-04. [Consulta: 8 desembre 2024].
«REVEALED: GCHQ's BEYOND TOP SECRET Middle Eastern INTERNET SPY BASE • The Register», 25-06-2014. Arxivat de l'original el 2014-06-25. [Consulta: 8 desembre 2024].
«How the British and Americans started listening in - BBC News», 02-04-2023. Arxivat de l'original el 2023-04-02. [Consulta: 8 desembre 2024].
«coastweek.com», 15-05-2013. Arxivat de l'original el 2013-05-15. [Consulta: 8 desembre 2024].
«New office buildings and the move, 1952-1954», 05-10-2006. Arxivat de l'original el 2006-10-05. [Consulta: 8 desembre 2024].
«INSIDE GCHQ: Welcome to Cheltenham's cottage industry • The Register», 06-09-2021. Arxivat de l'original el 2021-09-06. [Consulta: 8 desembre 2024].
«GCHQ - Richard Aldrich - Google Books», 04-04-2023. Arxivat de l'original el 2023-04-04. [Consulta: 8 desembre 2024].
«Scarborough's role in the Cuban missile crisis revealed - BBC News», 05-12-2019. Arxivat de l'original el 2019-12-05. [Consulta: 8 desembre 2024].
«The Eavesdroppers». Arxivat de l'original el 2013-11-01. [Consulta: 8 desembre 2024].
«R. v. Home Secretary, ex p. Hosenball», 21-05-2016. Arxivat de l'original el 2016-05-21. [Consulta: 8 desembre 2024].

wired.co.uk (Global: 2,053^rd place; Catalan: 4,492^nd place)

«A simple guide to GCHQ's internet surveillance programme Tempora (Wired UK)», 15-05-2016. Arxivat de l'original el 2016-05-15. [Consulta: 8 desembre 2024].

worldcat.org (Global: 5^th place; Catalan: 5^th place)

Christensen, Chris «Review ofInside Room 40: The Codebreakers of World War Iby Paul Grannon». Cryptologia, 35, 3, 7-2011, pàg. 282–288. DOI: 10.1080/01611194.2011.584295. ISSN: 0161-1194.
«The searchers: how radio interception changed the course of both world wars». Choice Reviews Online, 41, 02, 01-10-2003, pàg. 41–0906-41-0906. DOI: 10.5860/choice.41-0906. ISSN: 0009-4978.
Denniston, A. G. «The government code and cypher school between the wars». Intelligence and National Security, 1, 1, 1-1986, pàg. 48–70. DOI: 10.1080/02684528608431841. ISSN: 0268-4527.
«Advances in Cryptology — EUROCRYPT 2000». Lecture Notes in Computer Science, 2000. DOI: 10.1007/3-540-45539-6. ISSN: 0302-9743.
Murray, Craig. Dirty diplomacy: the rough-and-tumble adventures of a scotch-drinking, skirt-chasing, dictator-busting and thoroughly un-repentant ambassador stuck on the frontline of the war against terror. 1st Scribner hardcover ed. New York: Scribner, 2007. ISBN 978-1-4165-4801-0.

Government Code and Cypher School (Catalan Wikipedia)

bbc.com (Global: 20th place; Catalan: 66th place)

coastweek.com (Global: low place; Catalan: low place)

doi.org (Global: 2nd place; Catalan: 6th place)

doi.org

dx.doi.org

duncancampbell.org (Global: low place; Catalan: low place)

gchq.gov.uk (Global: low place; Catalan: low place)

google.cat (Global: 1,849th place; Catalan: 2nd place)

books.google.cat

theguardian.com (Global: 12th place; Catalan: 35th place)

theregister.co.uk (Global: 1,216th place; Catalan: 1,113th place)

theregister.com (Global: 3,700th place; Catalan: 8,141st place)

uniset.ca (Global: low place; Catalan: low place)

web.archive.org (Global: 1st place; Catalan: 1st place)

wired.co.uk (Global: 2,053rd place; Catalan: 4,492nd place)

worldcat.org (Global: 5th place; Catalan: 5th place)

bbc.com (Global: 20^th place; Catalan: 66^th place)

doi.org (Global: 2^nd place; Catalan: 6^th place)

google.cat (Global: 1,849^th place; Catalan: 2^nd place)

theguardian.com (Global: 12^th place; Catalan: 35^th place)

theregister.co.uk (Global: 1,216^th place; Catalan: 1,113^th place)

theregister.com (Global: 3,700^th place; Catalan: 8,141^st place)

web.archive.org (Global: 1^st place; Catalan: 1^st place)

wired.co.uk (Global: 2,053^rd place; Catalan: 4,492^nd place)

worldcat.org (Global: 5^th place; Catalan: 5^th place)