Ray, Sidney F. <br/><br/>
The photographic lens 
Sidney F. Ray 
 - London  Focal  c1979 
 - 350 p.  ill.  23cm 
<br/><br/><label>Subjects--Topical Terms: </label><br/>Photographic lenses
<br/><br/><label>Dewey Class. No.: </label>771.3  / 52