Gerring, john <br/><br/>
Case study research: Principles and practices 

 - New York  Cambridge University Press  2007 
 - 255 
<br/><br/><label>ISBN: </label>9780521676564 
<br/><br/><label>Subjects--Topical Terms: </label><br/>Case study research
<br/><br/><label>Dewey Class. No.: </label>001.432 GER