Ulrich, Bernhard. <br/><br/>
Soil acidity 

 - Berlin :  Springer-Verlag,  1991 
 - 224 p.  ; gráfs. 
<br/><br/><label>LCCN: </label>3189 
<br/><br/><label>Subjects--Topical Terms: </label><br/>Suelos--Acidez.
<br/><br/><label>Dewey Class. No.: </label>631.42  / U5