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- Language: English
- Year: 2004

- Author: Wagner Richard, Newman Ernest
- Language: English
- Year: 1933

- Author: Wagner Richard, Magee Bryan
- Language: English
- Year: 2001

- Author: Wagner Richard, Berger William
- Language: English
- Year: 1998

- Author: Wagner Richard, Berger William
- Language: English
- Year: 1998

- Author: Wagner Richard, Brener Milton E
- Language: English
- Year: 2006

- Author: Schacht Richard, Wagner Richard, Kitcher Philip
- Language: English
- Year: 2004

- Author: Rackham Arthur, Wagner Richard
- Language: English
- Year: 2010

- Author: Newman Ernest, Wagner Richard
- Language: English
- Year: 2014

- Author: Newman Ernest, Wagner Richard
- Language: English
- Year: 2014