- Author: Donald C Biggs
- Language: English
- Year: 1977
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- Year: 2005
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- Language: English
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- Author: Tim Pritchard
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- Year: 2005
- Author: James Megellas
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- Year: 2003
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- Year: 2003
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- Year: 2008
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- Year: 1997
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- Year: 2009
- Author: Dandridge M. Malone
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- Year: 1983