- Author: Stephen H. Kellert Helen E. Longino C. Kenneth Waters
- Language: English
- Year: 2006
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- Language: English
- Year: 2006
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- Language: English
- Year: 1996
- Author: Jacquette D.
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- Year: 2006
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- Year: 1975
- Author: Albert Einstein
- Language: English
- Year: 1956
- Author: Vincenzo De Risi
- Language: English
- Year: 2007
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- Language: English
- Year: 2004
- Author: Boolos G.S.
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- Year: 1998