Berry, Jeffrey M. , <br/><br/>
The interest group society / 
Jeffrey M. Berry, Clyde Wilcox. 
 - 5th ed. 
 - xii, 228 pages :  illustrations ;  23 cm. 
<br/><br/><label>ISBN: </label>0205604803 
<br/><br/><label>Subjects--Topical Terms: </label><br/>Pressure groups--United States.
<br/><br/><label>LC Class. No.: </label>JK1118   / .B47 2009