De Vaus, David. <br/><br/>
Surveys in social research / 
David de Vaus. 
 - 5th ed. 
 -  Routledge  2002. 
<br/><br/>13360 
<br/><br/><label>Subjects--Topical Terms: </label><br/>Social surveys.<br/>Social sciences - Research - Methodology.
<br/><br/><label>LC Class. No.: </label>HM538  / Dev.