Whitman, Edward C. (Winter 2013), "K for Katastrophe", Undersea Warfare, no. 49, US Navy, archived from the original on 24 September 2015, retrieved 20 August 2015
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Whitman, Edward C. (Winter 2013), "K for Katastrophe", Undersea Warfare, no. 49, US Navy, archived from the original on 24 September 2015, retrieved 20 August 2015