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- Language: English
- Year: 2000

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- Language: English
- Year: 2008

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- Language: English
- Year: 1999

- Author: W. S. F. Pickering
- Language: English
- Year: 2000

- Author: Nicholas Thoburn
- Language: English
- Year: 2003

- Author: Nicholas Thoburn
- Language: English
- Year: 2003