Barkaso, Maryann <br/><br/>
Understanding political science research methods  the challenge of inference 
Maryann Barakso, Daniel M. Sabet and Brian F. Schaffner. 
 - New York  Routledge  2014 
 - xvi, 233p.; 24cm. 
<br/><br/><label>ISBN: </label>9780415895200 
<br/><br/><label>Dewey Class. No.: </label>320.072  / B22U