Reynolds, Clyde <br/><br/>
The focalguide to filters / 
by Clyde Reynolds 
 - London  :  Focal Press,  1976 
 - 235 p.  :  ill.  ;  19 cm. 
 - The Focal photoguides .
<br/><br/><label>ISBN: </label>0240509234 
<br/><br/><label>Subjects--Topical Terms: </label><br/>Photography--Light filters--Amateurs' manuals