4
7
by Homer-Dixon, Thomas F.
Published 1999
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10
by Stonehouse, Bernard.
Published 2010
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14
by Lund, Jay R.
Published 2010
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16
17
Published 2007
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25
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45
by Sheail, John.
Published 2002
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64
by Spagna, Ana Maria
Published 2015
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70
Published 2010
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