Yin, Robert K. <br/><br/>
Case study research :   design and methods / 
Robert K. Yin. 
 - Second edition 
 - Thousand Oaks, CA :  Sage Publications,  1994. 
 - xvii, 170 pages :  illustrations 
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<br/><br/><label>Subjects--Topical Terms: </label><br/>Case method.<br/>Social sciences--Research--Methodology.