Soil classification:  a comprehensive system 
[prepared by] soil survey staff. 7th approximation. 
 - [Washington]  1960. 
 - v, 265 p.  illus.  28 cm. 
<br/><br/>Bibliographical footnotes. 
<br/><br/><label>LCCN: </label>agr60000310  
<br/><br/><label>Subjects--Topical Terms: </label><br/>Soils--Classification.
<br/><br/><label>LC Class. No.: </label>S591  / .A56 1960 
<br/><br/><label>Dewey Class. No.: </label>631.44