BCRP: [bureau central de renseignement pénitentiaire= . It's a French intelligenge agency for carceral security (riot prevention, surveillance of radicalized prisonners for avoid others radicalization, etc...)
Deuxième Bureau: France's external military intelligence agency from 1871 to 1940. It was dissolved together with the Third Republic upon the armistice with Germany.
DST: Directorate of Territorial Security – Direction de la surveillance du territoire. It was an intelligence agency of the Minister of Interior, charged with conducting counter-espionage (in particular in economic matters), and, since the end of the Cold War, also with counterterrorism issues. It was abolished in 2008 and merged into the DCRI.
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Armes, Keith. "French Intelligence on the Russian Army on the Eve of the First World War." Journal of Military History 82.3 (2018).
Bauer, Deborah Susan. Marianne is Watching: Knowledge, Secrecy, Intelligence and the Origins of the French Surveillance State (1870-1914). (PhD Dissertation, UCLA, 2013.) Online Bibliography pp 536–59
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Jackson, Peter. "French Military Intelligence responds to the German Remilitarisation of the Rhineland, 1936-A look at French intelligence machinery in 1936." Intelligence and National Security 22.4 (2007): 546-562.
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Keiger, John. France and the World since 1870 (2001) ch 4: "French Intelligence" pp 80-109.
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Porch, Douglas. The French Secret Services: A History of French Intelligence from the Drefus Affair to the Gulf War (Macmillan, 2003).
Warner, Michael. The Rise and Fall of Intelligence: An International Security History (2014)