Production: Case of Ordnance Factories. [2015-07-02]. (原始内容存档于2015-09-24). OFB in Brief - OrdnanceFactoryBoard. OrdnanceFactoryBoard. [2015-07-02]. (原始内容存档于2020-10-29)
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Bren LMG Modern Firearms-布倫輕機槍 Twin barrel Bren雙管布倫輕機槍 Dunlap, Roy F., Ordnance Went Up Front, The Samworth Press, 1948 George, John(Lt. Col.)Shots Fired