The soil: how the soil is made up 

 - Rev. ed. 
 - Rome  Food and Agriculture Oraganization of the Nations  1976 
 - 37 p. 
 - Better farming series no.4  FAO economic and social development series no.3/4 .
<br/><br/><label>ISBN: </label>925100143X 
<br/><br/><label>Subjects--Topical Terms: </label><br/>Soils
<br/><br/><label>Dewey Class. No.: </label>631.4