Drubbel, Bart.  <br/><br/>
The 21st Century Webster's Family Encloypedia (Toxin-Zwo) 

 - USA  Trident Press International  1999 
 -  10 .
<br/><br/><label>ISBN: </label>978-18-8877765-4 
<br/><br/><label>Source: </label>Textbook 
<br/><br/><label>Subjects--Topical Terms: </label><br/>African StudiesPolitical Science