- Author: Guy Robinson
- Language: English
- Year: 2003
- Author: ايناس خليفة خليفة
- Language: Arabic
- Year: 2010
- Author: Kevin R. Cox
- Language: English
- Year: 2014
- Author: Berry Craig
- Language: English
- Year: 2009
- Author: The Washington Post
- Language: English
- Year: 2013
- Author: John Morgan
- Language: English
- Year: 2011
- Author: Paul R. Moorcroft, Mark A. Lewis
- Language: English
- Year: 2006
Duce Kingdom
pdf
- Author: Efualajong Folefac
- Language: English
- Year: 2013
- Author: Charles Rawding
- Language: English
- Year: 2013
- Author: Irene Becci, Marian Burchardt, Jose Casanova
- Language: English
- Year: 2013