Brooks, David B <br/><br/>
Low-grade and nonconventional sources of manganese 

 - Washington, D.C.:   Resources For The Future, Inc.,   1966 
 - x, 123p. 
<br/><br/><label>Subjects--Topical Terms: </label><br/>Manganese ores
<br/><br/><label>Subjects--Index Terms: </label>Manganese mines and mining 
<br/><br/><label>Universal Decimal Class. No.: </label>553.3  / K6