Soil survey laboratory methods manual 
/por USDA. Soil Conservation Service 
 - [Washington, DC] :  National Soil Survey Center,  1992 
 - 400 p. :  ilus., tablas 
 - Soil survey investigations report  ; 42 .
 - Soil survey investigations report  ; 42 .
<br/><br/><label>LCCN: </label>100046 
<br/><br/><label>Subjects--Topical Terms: </label><br/>Suelos--Análisis.<br/>Suelos--Clasificación.<br/>Suelos--Manuales de laboratorio.<br/>Suelos--Química de.
<br/><br/><label>Dewey Class. No.: </label>631.44  / Us19