Lockheed Model 12 Electra Junior (English Wikipedia)

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"Lockheed 10 and 12." Archived 2010-01-23 at the Wayback Machine Another Time. Retrieved: January 17, 2010.
"Factsheet: Lockheed C-40." Archived 2011-01-13 at the Wayback Machine National Museum of the United States Air Force. Retrieved: January 8, 2010.
"Factsheet: Lockheed C-40A." Archived 2011-01-13 at the Wayback Machine National Museum of the United States Air Force. Retrieved: January 8, 2010.
"Factsheet: Lockheed C-40B." Archived 2011-01-13 at the Wayback Machine National Museum of the United States Air Force. Retrieved: January 8, 2010.
"Factsheet: Lockheed UC-40D." Archived 2013-10-05 at the Wayback Machine National Museum of the United States Air Force. Retrieved: January 8, 2010.
"Lockheed L-12A Electra Junior." Archived 2009-08-12 at the Wayback Machine Canada Aviation and Space Museum. Retrieved: January 17, 2010.
"Our Collection — East Hangar." Archived 2009-12-08 at the Wayback Machine Yanks Air Museum. Retrieved: January 17, 2010.
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"Reaching for the stars." Archived 2011-08-09 at the Wayback Machine Air France via www.airfrancelasaga.com, May 14, 2008. Retrieved: January 17, 2010.

"Our Collection — East Hangar." Archived 2009-12-08 at the Wayback Machine Yanks Air Museum. Retrieved: January 17, 2010.