Anderson B W <br/><br/>
Gem testing 

 - 9 
 -  1980 
 - p.  cm. 
<br/><br/><label>Standard No.: </label>45948 
<br/><br/><label>Source: </label> Textual 
<br/><br/><label>Subjects--Topical Terms: </label><br/>Geology
<br/><br/><label>Dewey Class. No.: </label>H19:81, H8;M0