"Etherton, Alan" <br/><br/>
Rocks and Minerals 

 -  oxford Press,,Nelson,Redspot,collins,Marshalk Cavendish,Federal  1985 
 - 233 
<br/><br/><label>ISBN: </label>9780751344196 
<br/><br/><label>Dewey Class. No.: </label>500  / 2916