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______________Achieving Our World. Rowman & Littlefield. New York. 2001
_____________ Alternative Visions. Rowman & Littelfield. Maryland. 1998.
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Harman, Graham. Space and Culture. vol. 12 no. 3, August. 2009.
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All the quotations used here are, by permission of Professor Klaus Held, from the unpublished English translation of his lecture course at the State University of Kyoto in summer semester 2001.
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Taylor Carman, Nore Dame University Philosophical Review. 2002.02.03