Idriess Ion L <br/><br/>
Opals and sapphires 

 -  1967 
 - p.  cm. 
<br/><br/><label>Standard No.: </label>46113 
<br/><br/><label>Source: </label> Textual 
<br/><br/><label>Subjects--Topical Terms: </label><br/>Geology
<br/><br/><label>Dewey Class. No.: </label>H1931, K7