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Weapons, an International Encyclopedia from 5000 Bc to 2000 Ad. New York: St. Martin's Press, 1980. Print.

Macpherson, Stewart M.. "Military Battles & Uprisings, excerpts from "The Highlander Magazine"." The Highlander Magazine. N.p., n.d. Web. 3 Feb. 2011. http://www.artillery-museum.ru/files/Image/34_thumb(2).jpg

"Ordnance BL 15 pounder - Wikipedia, the free encyclopedia." Wikipedia, the free encyclopedia. N.p., n.d. Web. 4 Feb. 2011. <http://en.wikipedia.org/wiki/Ordnance

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