Wootton, Graham. <br/><br/>
Interest-groups 
Graham Wootton. 
 - Englewood Cliffs, N.J. :  Prentice-Hall,  1970. 
 - 116 p. :  ill. ;  23 cm. 
 - Foundations of modern political science series. .
<br/><br/>Includes indexes and bibliographical footnotes. 
<br/><br/><label>Subjects--Topical Terms: </label><br/>Pressure groups.