Keys to soil taxonomy 

 - Rev. ed. 
 - Ithaca, N.Y. :  Soil Conservation Service,  1985 
 - 244 p. 
 - Technical monograph  ; 6 .
 - Technical monograph  ; 6 .
<br/><br/><label>LCCN: </label>30324 
<br/><br/><label>Subjects--Topical Terms: </label><br/>Suelos--Clasificación.