Ainsworth, Scott H. <br/><br/>
Analyzing interest groups :  group influence on people and policies / 
Scott H. Ainsworth. 
 - New York :  W. W. Norton,  2002. 
 - 260 p. 
<br/><br/><label>ISBN: </label>0393977080 (m) 9780393977080 (m) 
<br/><br/><label>Subjects--Topical Terms: </label><br/>Pressure groups--United States.<br/>Pressure groups.<br/>Grupos de presión.<br/>Grupos de presión--United States.
<br/><br/><label>LC Class. No.: </label>JK 1118  / A297a 2002