Berry, Jeffrey M. <br/><br/>
The interest group society 
Jeffrey M. Berry. 
 - 3th ed. 
 - New York  Longman  1997. 
 - xiii, 267 p. 
<br/><br/>Includes bibliographical references and index. 
<br/><br/><label>ISBN: </label>0673525112 
<br/><br/><label>Subjects--Topical Terms: </label><br/>Pressure groups--United States.
<br/><br/><label>LC Class. No.: </label>JK1118  / .B395 
<br/><br/><label>Dewey Class. No.: </label>322.4/3/0973