- Author: Ruud A. de Mooij, Michael Keen, Ian W.H. Parry, Michael Keen
- Language: English
- Year: 2012
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- Language: English
- Year: 2010
- Author: Nelson E. Burney
- Language: English
- Year: 2010
- Author: Hsu Shi-Ling
- Language: English
- Year: 2012