Morton/Williams <br/><br/>
Experimental Political Science and the Study of Causality 

 -  Cambridge University Press  Cambridge University Press  2010 
<br/><br/><label>ISBN: </label>9780511762888 
<br/><br/><label>Source: </label>EBOOK 
<br/><br/><label>Subjects--Topical Terms: </label><br/>Politics and International Relations