Nonfuel mineral model directory / 
by staff, Bureau of Mines. 
 - [Avondale, Md.] :  U.S. Dept. of the Interior, Bureau of Mines,  [1984]. 
 - 40 p. 
 - Bureau of Mines information circular 1984 ; 8966. .
<br/><br/><label>ISSN: </label>83-600342 
<br/><br/><label>Subjects--Topical Terms: </label><br/>Mines and mineral resources--Mathematical models--Directories.
<br/><br/><label>Dewey Class. No.: </label>622 s