Olsen, Wendy. <br/><br/>
Data collection :  key debates & methods in social research / 
Wendy Olsen. 
 - Thousand Oaks, CA :  SAGE Publications,  2012. 
 - xi, 234 p. :  ill. ;  24 cm. 
<br/><br/>Includes index and references : p. [222]-229. 
<br/><br/><label>ISBN: </label>9781847872555 9781847872562  RM102.41 
<br/><br/><label>Subjects--Topical Terms: </label><br/>Social sciences--Statistical methods.<br/>Social sciences--Research.