- Author: Johnson C. Douglas
- Language: English
- Year: 1972
![book The Root Causes of Sudan's Civil Wars: Old Wars and New Wars [Expanded 3rd Edition] (African Issues, 38)](/covers/files_170/3317000/1bd8ce89eccd0beddbeda58d8ec34b28-d.jpg)
- Author: Johnson E. Douglas (Author)
- Year: 1980
- Author: Johnson Georgia Douglas, Perkins Kathy A
- Language: English
- Year: 2006
- Author: Maureen Johnson & Douglas Johnson
- Language: English
- Year: 2011
- Author: Maureen Johnson & Douglas Johnson & Butch Krieger
- Language: English
- Year: 2011