Editing Signals intelligence (section)

==Further reading==
* [[James Bamford|Bamford, James]], ''Body of Secrets: How America's NSA and Britain's GCHQ Eavesdrop on the World'' (Century, London, 2001) {{ISBN|978-0-7126-7598-7}}
* {{Cite journal |last=Bolton |first=Matt |title=The Tallinn Cables: A Glimpse into Tallinn's Secret History of Espionage |journal=Lonely Planet Magazine |date=December 2011 |url=http://www.hot.ee/aasa/LPL_1211.pdf |access-date=25 June 2013 |issn=1758-6526 |url-status=dead |archive-url=https://web.archive.org/web/20131113200915/http://www.hot.ee/aasa/LPL_1211.pdf |archive-date=13 November 2013 }}
* {{cite book |editor1-last=Biyd |editor1-first=J. A. |editor2-last=Harris |editor2-first=D. B. |editor3-last=King |editor3-first=D. D. Jr. |editor4-last=Welch |title=Electronic Countermeasures |editor4-first=H. W. |publisher=Peninsula |location=Los Altos, CA |year=1979 |orig-year=1961  |isbn=0-932146-00-7}}
* {{Cite book |last=Gannon |first=Paul |title=Colossus: Bletchley Park's Greatest Secret |place=London |publisher=Atlantic Books |orig-year=2006 |year=2007 |isbn=978-1-84354-331-2}}
* {{Cite web |last=Jõgiaas |first=Aadu |title=Disturbing Soviet Transmissions in August 1991 |publisher=Museum of Occupations |url=http://www.okupatsioon.ee/en/lists/47-aadu-jogisoo |access-date=25 June 2013 |url-status=dead |archive-url=https://web.archive.org/web/20111114094618/http://www.okupatsioon.ee/en/lists/47-aadu-jogisoo |archive-date=14 November 2011 }}
* [[Nigel West|West, Nigel]], ''The SIGINT Secrets: The Signals Intelligence War, 1900 to Today'' (William Morrow, New York, 1988)