Orr, J M  <br/><br/>
Libraries as communication systems 

 - London:   Greenwood Press,   1977 
 - x, 220p.  
<br/><br/><label>ISBN: </label>0-8371-8936-5 
<br/><br/><label>Subjects--Topical Terms: </label><br/>Libraries 
<br/><br/><label>Subjects--Index Terms: </label>Communication  Library science  
<br/><br/><label>Universal Decimal Class. No.: </label>D 02:007   / L7