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 - Redlands (California)  Environmental Systems Research Institute 
 - Trimestral 
<br/><br/>1993 (HN.4) ; 1994 (HN.3) ; 1995 (FN.1) ; 1996. 
<br/><br/><label>ISSN: </label>1064-6108 
<br/><br/><label>Subjects--Index Terms: </label>Ciencia del suelo