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Plant, David (14 December 2005). "The Levellers". British Civil Wars and Commonwealth website. Archived from the original on 13 May 2008. Retrieved 2 July 2008.
Whitney Richard David Jones (2000). The Tree of Commonwealth, 1450–1793, Fairleigh Dickinson Univ
Press, ISBN0838638376. pp. 133Archived 23 July 2017 at the Wayback Machine,164