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2007-036 General COP Treatment Plan; Pueblo Grande Museum Project 2007–95; City of Phoenix Project No. ST87350010; p. 9Cultural ContextArchived March 24, 2014, at the Wayback Machine
Gathercole, Clare (2003). An archaeological assessment of Glastonbury(PDF). English Heritage Extensive Urban Survey. Taunton: Somerset County Council. pp. 19–20. Archived from the original(PDF) on 15 July 2011. Retrieved 2 February 2010.