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Descartes R, Cottingham J. Meditations on First Philosophy: With Selections from the Objections and Replies. Vol Cambridge texts in the history of philosophy. Rev. ed. Cambridge University Press; 1996.
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Bennett J. Secondary Qualities. In: Learning from Six Philosophers: Descartes, Spinoza, Leibniz, Locke, Berkeley, Hume. Clarendon; 2001:74-91. doi:10.1093/0198250924.003.0005
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Burke, Michael. Copper statues and pieces of copper: a challenge to the standard account. Copper statues and pieces of copper: a challenge to the standard account. 1992;52. http://findit.bham.ac.uk/primo_library/libweb/action/display.do?tabs=detailsTab&ct=display&fn=search&doc=TN_proquest1293500646&indx=1&recIds=TN_proquest1293500646&recIdxs=0&elementId=0&renderMode=poppedOut&displayMode=full&frbrVersion=&frbg=&&dscnt=0&scp.scps=scope%3A%2844BIR_PDA1_DS%29%2Cscope%3A%2844BIR_ETH1_DS%29%2Cscope%3A%2844BIR_LGUI_DS%29%2Cscope%3A%2844BIR_PURE_FT%29%2Cscope%3A%2844BIR_ALEPH_DS%29%2Cscope%3A%2844BIR_MIM_DS+%29%2Cscope%3A%2844BIR_RLIST_DS%29%2Cscope%3A%2844BIR_ML_DS%29%2Cscope%3A%2844BIR_SFX_DS%29%2Cscope%3A%2844BIR_DR1_DS%29%2Cscope%3A%2844BIR_DR2_DS%29%2C44BIR_Ebsco_1%2Cprimo_central_multiple_fe&mode=Basic&vid=44BIR_VU1&srt=rank&tab=local&vl(freeText0)=Copper%20Statues%20and%20Pieces%20of%20Copper%3A%20A%20Challenge%20to%20the%20Standard%20Account&dum=true&dstmp=1505298488192
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Conee, Earl Brink 1950-. Riddles of Existence [Electronic Resource] : A Guided Tour of Metaphysics.; 2005. http://findit.bham.ac.uk/primo_library/libweb/action/display.do?tabs=detailsTab&ct=display&fn=search&doc=44BIR_PDA1_DSebr10194211&indx=2&recIds=44BIR_PDA1_DSebr10194211&recIdxs=1&elementId=1&renderMode=poppedOut&displayMode=full&frbrVersion=&frbg=&&dscnt=0&scp.scps=scope%3A%2844BIR_PDA1_DS%29%2Cscope%3A%2844BIR_ETH1_DS%29%2Cscope%3A%2844BIR_LGUI_DS%29%2Cscope%3A%2844BIR_PURE_FT%29%2Cscope%3A%2844BIR_ALEPH_DS%29%2Cscope%3A%2844BIR_MIM_DS+%29%2Cscope%3A%2844BIR_RLIST_DS%29%2Cscope%3A%2844BIR_ML_DS%29%2Cscope%3A%2844BIR_SFX_DS%29%2Cscope%3A%2844BIR_DR1_DS%29%2Cscope%3A%2844BIR_DR2_DS%29%2C44BIR_Ebsco_1%2Cprimo_central_multiple_fe&mode=Basic&vid=44BIR_VU1&srt=rank&tab=local&vl(freeText0)=riddles%20of%20existence&dum=true&dstmp=1505297810314
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Earl Conee , and  Theodore Sider. Riddles of Existence : A Guided Tour of Metaphysics: New Edition. OUP Oxford; 2014. https://ebookcentral.proquest.com/lib/oasispreview/reader.action?docID=1794211
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Shafer-Landau R. Ethical Theory: An Anthology. Vol 17. 2nd ed. Wiley-Blackwell; 2013. http://sfxeu07.hosted.exlibrisgroup.com/bham?isbn=9781280878435%20
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Shafer-Landau R. Ethical Theory: An Anthology. Vol 17. 2nd ed. Wiley-Blackwell; 2013. http://sfxeu07.hosted.exlibrisgroup.com/bham?isbn=9781280878435%20
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Shafer-Landau R. Ethical Theory: An Anthology. Vol 17. 2nd ed. Wiley-Blackwell; 2013. http://sfxeu07.hosted.exlibrisgroup.com/bham?isbn=9781280878435%20