Sinkankas J <br/><br/>
Prospecting for gemstones and minerals 

 -  1970 
 - p.  cm. 
<br/><br/><label>Standard No.: </label>45947 
<br/><br/><label>Source: </label> Textual 
<br/><br/><label>Subjects--Topical Terms: </label><br/>Geology
<br/><br/><label>Dewey Class. No.: </label>H19:15, L0