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* Hodgson, J "Neolithic Enclosures in the Isar Valley, Bavaria" in "Enclosures and Defences in the Neolithic of Western Europe (Part ii)", Burgess, C, Topping, P, Mordant, C and Maddison, M, Oxbow, 2003 qtd in Cope, J, "The Megalithic European", Harper Collins, 2004, pp48-49.