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- Language: English
- Year: 2016
- Author: Stewart Ian
- Language: English
- Year: 2009
- Author: Stewart Ian
- Language: English
- Year: 2010
- Author: Pappas Theoni
- Language: English
- Year: 1999
- Author: Lehmann Ingmar, Posamentier Alfred S
- Language: English
- Year: 2014
- Author: Henle James M
- Language: English
- Year: 2015
- Author: Dewdney A. K
- Language: English
- Year: 2004
- Author: Ellenberg Jordan
- Language: English
- Year: 2014
- Author: Barrow John D
- Language: English
- Year: 2010
- Author: Bellos Alex
- Language: English
- Year: 2010