↑Palmer, Alan; Palmer, Veronica (1992). The Chronology of British History. London: Century Ltd. pp.142–145. ISBN0-7126-5616-2.
↑Clodfelter, Micheal (2017). Warfare and Armed Conflicts: A Statistical Encyclopedia of Casualty and Other Figures, 1492-2015. McFarland. p.11. ISBN9781476625850.
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