Emerging technologies in agricultural production 
edited by Yao-chi Lu 
 - [Washington]  USDA. Cooperative State Research Service  1983 
 - 152 p.  28 cm 
 - Report / USDA. Cooperative State Research Service .
 - Report / USDA. Cooperative State Research Service .
<br/><br/><label>Subjects--Index Terms: </label>Eua Produccion Tecnologia Economia agricola