Report on survey of labour conditions in manganese 

 -  1963 
 - 69p.  cm. 
<br/><br/><label>Source: </label> General Book 
<br/><br/><label>Subjects--Topical Terms: </label><br/>Technological Industry
<br/><br/><label>Dewey Class. No.: </label>X9(F172):95.2.N62t4, K3