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Keith Sinclair: Grey, George 1812 - 1898 (www.dnzb.govt.nz) Dictionary of New Zealand Biography. 22.6.2007. Viitattu 2.8.2010. (englanniksi)
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Sir George GreyNew Zealand History Online. History Group of the New Zealand Ministry for Culture and Heritage. Viitattu 2.8.2010. (englanniksi)
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