Lang, Harbert <br/><br/>
Matte smelting its principles and later developments discussed.  with an account of the pyritic process / 
Harbert Lang 
 - 3rd ed. 
 - New York :  [s.n.],  1903 
 - 8 degree. 
<br/><br/><label>Subjects--Topical Terms: </label><br/>Metallurgy
<br/><br/><label>Dewey Class. No.: </label>136