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- Language: English
- Year: 2010
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- Year: 2008
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- Year: 2010
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- Year: 2010
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- Year: 2008
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- Year: 2006
- Author: D. Gopalakrishna
- Language: English
- Year: 2009
- Author: Jose Manuel Salazar-Xirinachs, Maryse Robert
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- Year: 2001
- Author: Edward Maunde Thompson
- Language: English
- Year: 2010