Immroth, John Phillip. <br/><br/>
A guide to Library of Congress classification / 
John Phillip Immroth. 
 - Rochester, N.Y. :  Libraries Unlimited,  1968. 
 - 356 p. :  ill. ;  24 cm. 
<br/><br/><label>Subjects--Topical Terms: </label><br/>Classification, Library of Congress