Morgan, Stephen L  <br/><br/>
Counter factuals and causal inference methods and principles for social research 

 - London:  Cambridge,  2007 
 - xii,378p.:  ill.;  25cm. 
<br/><br/><label>ISBN: </label>9780521856157 
<br/><br/><label>Subjects--Topical Terms: </label>
<br/><br/><label>LC Class. No.: </label>H62.M646