Classification 
Library of Congress. 
 - Washington  Library of Congress  1915 
 - 273p.; 23cm. 
<br/><br/> Contents:- Literature Sub classes P N, P R, P S, P Z. 
<br/><br/><label>Subjects--Topical Terms: </label><br/>Library science.
<br/><br/><label>Dewey Class. No.: </label>25.43  / U04C