Wasserman, Paul <br/><br/>
Encyclopedia of business information sources  

 - 4th ed.  
 - Michigan:   Gale Research Company,   1980 
 - xxxii, 777p.  
<br/><br/><label>ISBN: </label>0-8103-0368-X 
<br/><br/><label>Subjects--Topical Terms: </label><br/>Social science 
<br/><br/><label>Subjects--Index Terms: </label>Information source  
<br/><br/><label>Universal Decimal Class. No.: </label>D 03(026):58(73)  / L0;M0