Webster, Robert. <br/><br/>
Gems in jewellery / 
By Robert Webster FGA. 
 - London :  NAG Press Limited,  1991. 
 - 136 p. :  ill. ;  23 cm. 
 - 553.8 (NLA) .
<br/><br/><label>ISBN: </label>719800315 
<br/><br/><label>Subjects--Topical Terms: </label><br/>Precious stones.
<br/><br/><label>Universal Decimal Class. No.: </label>553.8 (NLA)