Keys to soil taxonomy 

 - 3 rev. ed. 
 - Ithaca, N.Y. :  The Service,  1987 
 - 280 p. 
 - Technical monograph  ; 6 .
 - Technical monograph  ; 6 .
<br/><br/><label>LCCN: </label>3618 
<br/><br/><label>Subjects--Topical Terms: </label><br/>Suelos--Clasificación.