Anderson, B. W. (Basil William),  1901- <br/><br/>
Gem testing / 
by B. W. Anderson 
 - 8th ed. 
 - London :  Butterworth,  1971 
 - 13, 384 p., 6 plates. :  ill. , (some col.). ;  23 cm. 
<br/><br/> First pub. in 1942 under title: Gem testing for jewellers 
<br/><br/>Includes bibliographical references 
<br/><br/><label>ISBN: </label>0408701277 
<br/><br/><label>Subjects--Topical Terms: </label><br/>Precious stones