Coffman, Joseph S. <br/><br/>
Manganese availability--market economy countries :  1980's perspective / 
by Joseph Coffman. 
 - Washington, D.C. :  U.S. Dept. of the Interior, Bureau of Mines,  1992. 
 - ii, 25 p. :  ill., map. 
 - Information circular ;  9327 .
 - Information circular (United States. Bureau of Mines) ;  9327. .
<br/><br/><label>Subjects--Topical Terms: </label><br/>Manganese industry.<br/>Manganese mines and mining.