Carr, Stephen. <br/><br/>
Technology for Small Scale Farmers in Sub- Saharan Africa;  Experience with Food Crop Production in Five Major Ecological Zones/ 
Stephen J Carr. 
 - Washington, D.C. :  World Bank,  1989. 
 - 106p;  ill. 
<br/><br/><label>ISBN: </label>082131355 
<br/><br/><label>Dewey Class. No.: </label>630.967  / CAR.M9