Boeing GA-1
Encyclopedia
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External links
- http://www.ascho.wpafb.af.mil/REMARKABLE/CHAP2.HTM
- http://www.ibiblio.org/pub/academic/history/marshall/military/airforce/usaf_descriptions/bombers.txt
- http://www.aerofiles.com/_boe2.html
- http://home.att.net/~jbaugher/1908-1920.html