Soil. The Yearbook of Agriculture 1957 

 - Washington :   Government Printing Office,   1957. 
 - xiii, 784 p. :   il.; láms.; mapas, tablas ;   24 cm. 
<br/><br/> Glosario pp. 751-770 
<br/><br/><label>Subjects--Topical Terms: </label><br/>SUELOS (AGRICULTURA)