Croy, O. R. <br/><br/>
Retouching :  corrective techniques in photography / 
O.R. Croy. 
 - 4th rev. ed. 
 - London :  Focal Point,  1964. 
 - 191 p. :  ill. ;  22 cm. 
 - The manuals of photo-technique .
<br/><br/> Includes index. 
<br/><br/><label>ISBN: </label>024044907X 
<br/><br/><label>Subjects--Topical Terms: </label><br/>Photography.