Gubelin, Eduard Josef,  1913- <br/><br/>
The color treasury of gemstones / 
text by Eduard Gubelin ; photos. by Michael Wolgensinger and Eduard Gubelin 
 - London :  Elsevier,  1975 
 - 137 p. :  col. ill. ;  30 cm. 
<br/><br/> Translation of Edelsteine 
<br/><br/><label>ISBN: </label>0729000419 
<br/><br/><label>LCCN: </label>76-356272 
<br/><br/><label>Subjects--Topical Terms: </label><br/>Precious stones