Struif Bontkes Tjark <br/><br/>
On Dinka Cattle And Grain An Interdisciplinary Simulation Study Of Rural Area In Southern Sudan 

 -  Wageningen Netherlands : Wag.Agric.Univ 1992. 
 - 102 
<br/><br/><br/>Eng 
<br/><br/><label>ISBN: </label>9067542091 (Pbk);Z