Dahl ,Robert A <br/><br/>
Polyarchy  Participation and opposition 

 - New Haven  Yale university press  1971 
 - x, 257 p.; 22cm 
<br/><br/><label>ISBN: </label>300015658 
<br/><br/><label>Subjects--Topical Terms: </label><br/>Divided government<br/>Opposition political science<br/>Political opposition