Extraction metallurgy '81  report of discussion on papers presented at a symposium 
Institution of mining and metallurgy. IMM. London. 
 - London  Institution of mining and metallurgy  1981 
 - 113 p.  il  30 cm 
<br/><br/> Cover title: Extraction metallurgy '81, discussion.<br/>organized by the Institution of Mining and Metallurgy in collaboration with Gesellschaft Metallhütten- und Bergleute, Benelux Métallurgie and Société francaise de métallurgie and held in London from 21 to 23 September, 1981. 
<br/><br/><label>Subjects--Topical Terms: </label><br/>metalurgia<br/>simposio<br/>congreso
<br/><br/><label>Universal Decimal Class. No.: </label>669.09