Sillanpaa, M. <br/><br/>
Trace elements in soils and agriculture 
/by Mikko Sillanpaa 
 - Rome  FAO of the United Nations  1972 
 - FAO soils bulletin .
<br/><br/><label>ISBN: </label>9251004854 
<br/><br/><label>Dewey Class. No.: </label>581.1335  / SIL