691st Intelligence, Surveillance and Reconnaissance Group (English Wikipedia)

Analysis of information sources in references of the Wikipedia article "691st Intelligence, Surveillance and Reconnaissance Group" in English language version.

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Montes, SSG Alexandre (6 May 2016). "Return of the 691st ISR Group, aiding partners and Air Force Cryptologic Enterprise". 70th Intelligence, Surveillance and Reconnaissance Wing Public Affairs. Retrieved 21 December 2016.
Daub, SRA Samuel (15 September 2014). "70th Wing Inactivates 691st ISR Group". 70th Intelligence, Surveillance and Reconnaissance Wing Public Affairs. Retrieved 21 December 2016.

afhra.af.mil

Bailey, Carl E. (4 August 2016). "Factsheet 691 Intellignece, Surveillance and Reconnaissance Group (ACC)". Air Force Historical Research Agency. Retrieved 21 December 2016.

usafunithistory.com

"691st Intelligence, Surveillance and Reconnaissance Group" (PDF). USAFUnitHistory.com. 23 November 2010. Retrieved 21 December 2016.