Cleaver Kevin M.and  Schreiber Gotz A. <br/><br/>
Reversing the spiral: The population,agriculture and environment nexus in sub-saharan africa 

 - The world bank  Washington  1994 
<br/><br/><label>ISBN: </label>821327690 
<br/><br/><label>LC Class. No.: </label>FAO GF 701   / C54 1994