Olsen, Ole Speirs, Mike <br/><br/>
Indigenous integrated farming systems in the Sahel / Mike Speirs and Ole Olsen 

 - Washington, D.C  World Bank  1992 
 - x, 80p. 
 - Africa technical Department series .
<br/><br/><label>Subjects--Topical Terms: </label><br/>Agriculture<br/>Farming - Sahel