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Keystone XLB-3 Biến thểThực đơn
Keystone XLB-3 Biến thểLiên quan
Keystone LB-6 Keystone B-3 Keystone B-4 Keystone B-6 Keystone LB-5 Keystone XLB-3 Keystone B-5 Keystone XO-15 Keystone, Iowa Keystone, WisconsinTài liệu tham khảo
WikiPedia: Keystone XLB-3 http://www.nationalmuseum.af.mil/factsheets/factsh... http://www.nationalmuseum.af.mil/factsheets/factsh... http://home.att.net/~jbaugher2/lb3.html https://web.archive.org/web/20090102111503/http://... https://web.archive.org/web/20131004214241/http://... https://commons.wikimedia.org/wiki/Category:Keysto...