Okigbo, B.N. <br/><br/>
Development of sustainable agricultural production systems in africa: roles of international agricultural research systems 
B.N. Okigbo 
 - Ibadan  IITA  1991 
 - 66p.;ill 
<br/><br/><label>Subjects--Topical Terms: </label><br/>Sustainable agriculture
<br/><br/><label>LC Class. No.: </label>S494.5.O4 1991