Troeh Frederick R <br/><br/>
Introductory soil science : Laboratory manual 

 - Iowa  State University Press         1964 
 - 95p.  cm. 
<br/><br/><label>Standard No.: </label>56008 
<br/><br/><label>Source: </label> Textual 
<br/><br/><label>Subjects--Topical Terms: </label><br/>Agriculture
<br/><br/><label>Dewey Class. No.: </label>J:1:f3, K4