“[Part II: Introduction].” Medieval Military Technology, by Kelly DeVries, University of Toronto Press, 1992, pp. 125–126, www.jstor.org/stable/10.3138/j.ctt2tv1qn.9. Accessed 19 Sept. 2020.
DeVries, K. (1992). [Part II: Introduction]. In Medieval Military Technology (pp. 125-126). University of Toronto Press. Retrieved September 19, 2020, from http://www.jstor.org/stable/10.3138/j.ctt2tv1qn.9
DeVries, Kelly. "[Part II: Introduction]." In Medieval Military Technology, 125-26. University of Toronto Press, 1992. Accessed September 19, 2020. http://www.jstor.org/stable/10.3138/j.ctt2tv1qn.9.
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