The soil: how  to conserve the soil 

 - Rome  Food and Agriculture Organization of the United Nations (FAO)  1976 
 - 29p.  20cm. 
<br/><br/><label>ISBN: </label>9251001448 
<br/><br/><label>Subjects--Topical Terms: </label><br/>Soils
<br/><br/><label>LC Class. No.: </label>FOS S494.5.F3