
- Author: Arthur M. Langer (auth.)
- Language: English
- Year: 1997

- Author: Arthur M. Langer (auth.)
- Language: English
- Year: 2012

- Author: Arthur M. Langer
- Language: English
- Year: 2007

- Author: Arthur M Langer
- Language: English
- Year: 2004

- Author: Arthur M. Langer
- Language: English
- Year: 2008

- Author: Arthur M. Langer
- Language: English
- Year: 2008

- Author: Arthur M. Langer
- Language: English
- Year: 2008

- Author: Arthur M. Langer
- Language: English
- Year: 2008