Croy, Otto R.,  1902- <br/><br/>
The complete art of printing and enlarging / 
by O. R. Croy 
 - 3rd ed. 
 - London :  Focal Press,  1976 
 - 256 p. :  ill. ;  24 cm. 
<br/><br/> Includes index. 
<br/><br/>Bibliography: p. 252-256. 
<br/><br/><label>ISBN: </label>0240447557 
<br/><br/><label>LCCN: </label>78-319262 
<br/><br/><label>Subjects--Topical Terms: </label><br/>Photography--Printing processes<br/>Photography--Enlarging