Croy, Otto R.,  1902- <br/><br/>
The complete art of printing and enlarging / 
by O.R. Croy 
 - 11th ed. 
 - London :  Focal Press,  1970 
 - 256 p. :  ill. ;  24 cm. 
<br/><br/><label>LCCN: </label>87-128318 
<br/><br/><label>Subjects--Topical Terms: </label><br/>Photography--Printing processes<br/>Photography--Enlarging