Vaus, D A de <br/><br/>
Surveys in social research 

 - 2nd ed. 
 - London  Unwin E Hyman 
 - xii, 341 p. 
<br/><br/><label>ISBN: </label> POU11.95 
<br/><br/><label>Dewey Class. No.: </label>300.72 V467S