Guidelines for soil description 

 - 4th ed 
 - Rome :  Food and Agriculture Organization of the United Nations,  2006 
 - x, 97 p. :  ill. ;  25 cm 
<br/><br/><label>ISBN: </label>9251055211 9789251055212 
<br/><br/><label>Subjects--Topical Terms: </label><br/>Soil profiles<br/>Soils
<br/><br/><label>Dewey Class. No.: </label>631 FOO 2006 A038 Or.