Walker, Gloria L. <br/><br/>
Survey methods and statistical summary of nonfuel minerals 
by Gloria L. Walker and Stephen D. Smith. 
 - Washington  Bureau of Mines  1988. 
 - [2], 44 p.  28 cm. 
<br/><br/><label>LCCN: </label>doc92000690  
<br/><br/><label>Subjects--Topical Terms: </label><br/>Mines and mineral resources--United States.<br/>Nonfuel minerals industry--United States.