Twyman, F.  <br/><br/>
Optical glassworking 
F. Twyman 
 - London  Hilger and Watts Ltd.  1955 
 - 275p.  illus 
<br/><br/><label>Subjects--Topical Terms: </label><br/>Optics
<br/><br/><label>Universal Decimal Class. No.: </label>681.4.02  / TRY