- Author: Floyd L. Williams
- Language: English
- Year: 2023
- Author: Floyd L. Williams
- Language: English
- Year: 2023
- Author: Floyd L Williams
- Language: English
- Year: 1991
- Author: Floyd L Williams
- Language: English
- Year: 2003
- Author: Klaus Kirsten Floyd L. Williams Editors
- Language: English
- Year: 2010
- Author: Klaus Kirsten Floyd L. Williams
- Language: English
- Year: 2010