Research for maximum yield in harmony with nature satellite symposium sponsored by PPI 

 - México, D. F. :  Sociedad Mexicana de la Ciencia del Suelo,  1994 
 - 88 p. 
<br/><br/><label>LCCN: </label>71334 
<br/><br/><label>Subjects--Topical Terms: </label><br/>Suelos--Congresos.
<br/><br/><label>Dewey Class. No.: </label>631.4063  / C65r 1994