Olsen, Wendy. <br/><br/>
Data collection : key debates & methods in social research  
by Wendy Olsen. 
 - Thousand Oaks, CA :  SAGE Publications,  2011. 
 - xi, 234p 
<br/><br/><label>ISBN: </label>9781847872562 
<br/><br/><label>LCCN: </label>2011921429 
<br/><br/><label>Dewey Class. No.: </label>300.72 OLS