Weir, Wilbert Walter. <br/><br/>
Soil science, its priciples and practice, including basic processes for managing soil and improving their fertility 

 - Chicago :  Lippincott,  1936 
 - 615 p.  : ilus. 
<br/><br/><label>LCCN: </label>53360 
<br/><br/><label>Subjects--Topical Terms: </label><br/>Suelos.
<br/><br/><label>Dewey Class. No.: </label>631.4  / W45