Perry, J W <br/><br/>
Documentation and information retrieval:   An introduction basic principles and cost analysis  

 - Ohio:   Ther Press of Western Reserve University and Interscience Publishers, Inc.  1957 
 - xii, 156p.  
<br/><br/><label>Subjects--Topical Terms: </label><br/>Library science 
<br/><br/><label>Subjects--Index Terms: </label>Classification system  Graphic records  
<br/><br/><label>Universal Decimal Class. No.: </label>D 002   / J7