The encyclopedia Americana. 

 - 1961 ed. 
 - New York :  Americana Corporation,   c 1961. 
 - Vols. :  ill. ;  26 cm. 
<br/><br/>V. 21- Orley-Photographic Apparatus ; 
<br/><br/>337   337 
<br/><br/><label>Subjects--Topical Terms: </label><br/>Encyclopedia--Americana.
<br/><br/><label>Dewey Class. No.: </label>031 / E19