Berry, Jeffrey M.,   1948- <br/><br/>
The interest group society /  
Jeffrey M. Berry 
 - London  Harper Collins  c1989. 
 - 260 p.  ill. 
<br/><br/><label>ISBN: </label>0673398897 
<br/><br/><label>Subjects--Topical Terms: </label><br/>Pressure groups--United States
<br/><br/><label>LC Class. No.: </label>JK1118