Okigbo, Bede N. <br/><br/>
Development of sustainable agricultural production systems in Africa  : roles of international agricultural research centers and national agricultural research systems 

 - Ibadan, Nigeria :  International Institute of Tropical Agriculture,  1991 
 - 65 p.  : ilus 
<br/><br/><label>LCCN: </label>3121 
<br/><br/><label>Subjects--Topical Terms: </label><br/>Agricultura de subsistencia.<br/>Agricultura--Africa--Africa.<br/>Agricultura--Investigacion--Africa.<br/>Sistemas de producción.