Postel, Sandra. <br/><br/>
Altering the earth's chemistry  : assessing the risks 

 - Washington, D. C. :  World Watch Institute,  1986 
 - 66 p 
 - Worldwatch paper  ; 71 .
 - Worldwatch paper  ; 71 .
<br/><br/> D48-145 
<br/><br/><label>LCCN: </label>3087 
<br/><br/><label>Subjects--Topical Terms: </label><br/>Suelos--Contaminación.<br/>Suelos--Química de.