- Author: Barbara Keesling
- Language: English
- Year: 1994
- Author: Barbara Keesling
- Language: English
- Year: 1997
- Author: Barbara Keesling
- Language: German
- Year: 1995
- Author: Barbara Keesling Ph.D.
- Language: English
- Author: Barbara Keesling
- Language: English
- Year: 1999
- Author: Barbara Keesling
- Language: English
- Year: 2001
- Author: Barbara Keesling
- Language: English
- Year: 1997
- Author: Barbara Keesling Ph.D.
- Language: English
- Year: 2006
- Author: Barbara Keesling
- Language: English
- Year: 1995