Optical glassworking craftsmen and technicians working party 

 - Watford    Engineering Industry Training Board   1967 
 - 20p  30cm 
 -    .
<br/><br/><label>Subjects--Topical Terms: </label><br/>Optical Glassworking -- Manual -- Manufacture
<br/><br/><label>Dewey Class. No.: </label>621.9 E57o