Ecnomics aspects of iron-ore preparation. 

 - Geneva  United Nations        1966 
 - "xiv, 280p."  cm. 
<br/><br/><label>Standard No.: </label>91414 
<br/><br/><label>Source: </label> Reference Collections 
<br/><br/><label>Subjects--Topical Terms: </label><br/>Minings
<br/><br/><label>Dewey Class. No.: </label>"X9(HZ7182:2), K6/UN"