Interest group politics / 
edited by Allan J. Cigler, Burdett A. Loomis. 
 - 4th ed. 
 - Washington, D.C. :  CQ Press,  1995.   
 - xi, 435 p. :  ill. ;  23 cm. 
<br/><br/>Includes bibliographical references and index. 
<br/><br/>Group formation and membership--Groups in the election process--Groups in the policy-making process. 
<br/><br/><label>ISBN: </label>0871878011 
<br/><br/><label>Subjects--Topical Terms: </label><br/>Pressure groups--United States.