Elwell D.,  . <br/><br/>
Man-Made Gemstones /  

 - 1st ed /  
 - England :   Ellis Horwood Limited ,   1981 
 - 191p ;  
<br/><br/><label>ISBN: </label>0 85312 128 1 
<br/><br/><label>Subjects--Topical Terms: </label><br/>Physics
<br/><br/><label>Dewey Class. No.: </label>C21:(H19:164)  / L9