Gerring, John, <br/><br/>
Social Science Methodology : 

 -  Cambridge University Press,  2001. 
 - 322 pages 
<br/><br/><label>ISBN: </label>9780521801133 
<br/><br/><label>Subjects--Topical Terms: </label><br/>Political Science.
<br/><br/><label>Dewey Class. No.: </label>300  / GER