Keys to soil taxonomy / 
by Soil Survey Staff. 
 - 5th ed. 
 - Blacksburg, Virginia :  Pocahontas Press, Inc.,   1992. 
 - iv, 306 p. ;   28 cm. 
 - SMSSS technical monograph;   no.19 .
<br/><br/>Includes bibliographical references and index. 
<br/><br/><label>Subjects--Topical Terms: </label><br/>Soils-- Classification.
<br/><br/><label>Dewey Class. No.: </label>631.44